Hcg double time

Ug this is me I wish I had never gotten hcg draws done because it has given me so much anxiety. 20 dpo - 3179. 23 dpo- 6273. 73 hours doubling time. 25 dpo- 8714 101 hours dt. 27 dpo- 12867 83 hours dt. 31 dpo- 20945 136 hour dt. I had a scan at 5.5 for some red spotting and they saw a sac, yolk, and tiny fetal pole.

hCG doubling time: In the first 4 weeks of a viable pregnancy, the HCG level typically doubles after every 2 to 3 days. After 6 weeks of pregnancy HCG doubles every 96 hours. If your baseline level is higher than 5mlU/ml, your doctor may prescribe a repeat test in a couple of days as the hCG level may be doubled. Some researchers claim that first trimester beta-human chorionic gonadotrophin (beta HCG) levels have a constant doubling time; others suggest doubling time increases as pregnancy progresses. This study was designed to settle the debate by analysing a large series of serial serum beta HCG determinations from 143 pregnant women whose day of ... That means your hCG levels might not double but are totally normal for you. That said, it’s useful to know how hCG doubling time works in theory. Over to Dr. Matthews again: “An hCG level should double …13/14 DPO - 59 HCG (46 hour doubling time, 105% 2-day increase) 16/17 DPO - 228 HCG (36 hour doubling time, 145% 2-day increase) 21/22 DPO - 743 HCG (71 hour doubling time, 60% 2-day increase) I know it can vary from 48-72 hours in doubling time but that 4th beta with a 71-hour doubling time has me very concerned. I hope this baby sticks.We are in a wait-and-see scenario. I had my hcg tested last week 48 hours apart. The first was 251 and the second was 443. So it went up 75%, or 58* (edit) hour doubling. I know that the ideal range is 48-72 hours but my doctor was very cautious and not so optimistic when she explained my numbers. During my last pregnancy my hcg almost tripled ...Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …The Double Heart quilt block is a pretty fabric valentine. Download the free quilt block and instructions to make it yourself at HowStuffWorks. Advertisement Add a romantic touch t...For me personally however, I have found the ranges inaccurate. Anything greater than 48 hour doubling was not viable for me personally (so many others have the exact opposite experience!!) my only viable pregnancy maintained less than 48 hour doubling time past 8000 HCG. My non viable pregnancies slowed down dramatically after 1000-2000 or so.

Nov 18, 2010 at 5:21 PM. Anyone know whether hcg levels ytake longer to double after they hit 1200? My levels were more than doubling every 48 hours, but since they hit 1200 they have doubled approximately every 72 hours. They were 750 on Monday, 1450 on Wednesday and 2049 on Thursday (one day later).That means your hCG levels might not double but are totally normal for you. That said, it’s useful to know how hCG doubling time works in theory. Over to Dr. Matthews again: “An hCG level should double …Doubling time slows after a certain level. My first draw was 1288 and my second was 3110. A doubling time of 57 hours. I believe most people say after 1200, doubling time is between 72-90 hrs. Even at the beginning doubling time is 48-72 hours and you’re still within that. I’ve had 3 ultrasounds with strong hear rates and I’m currently 10+5.Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …Are you in the market for a new double oven electric range? With so many options available, it can be overwhelming to find the best one for your needs. Double oven electric ranges ...Dec 10, 2023 · Doubling Time: This is the calculated time (in hours) it takes for your hCG levels to double. Normalized 48-Hour Percentage Rise in hCG: This shows the percentage increase in your hCG levels, normalized to a 48-hour period. It accounts for the actual time elapsed between the two tests. Notes:

Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …When planning a day out with your children, a double stroller is a must-have addition to your outing. Your children will have a place to rest, and the stroller’s storage area is co...Nov 24, 2023 · Then, when it gets to over 100 to somewhere between 1200 and 1600 it should approximately double in 48 hours. After that it slows significantly to doubling over 72 hours. As it nears 10,000 there wasn't much data to support the increase timings, because doctors begin monitoring by ultrasound rather than hCG. 2. The hCG doubling time is crucial, indicating: Early Pregnancy Confirmation: HCG is used to confirm pregnancy and helps in monitoring the progress, especially in the early stages of the pregnancy. Doubling time lets you assess whether the pregnancy is progressing in the expected way or not. typically hCG level gets doubled every 48 to 72 hours ...

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Apr 1, 2021 · Ug this is me I wish I had never gotten hcg draws done because it has given me so much anxiety. 20 dpo - 3179. 23 dpo- 6273. 73 hours doubling time. 25 dpo- 8714 101 hours dt. 27 dpo- 12867 83 hours dt. 31 dpo- 20945 136 hour dt. I had a scan at 5.5 for some red spotting and they saw a sac, yolk, and tiny fetal pole. When it comes to purchasing a new mattress, one of the most important factors to consider is its size. A double mattress is a popular choice for many individuals and couples due to...My beta doubling times were on the slower side. My first beta was 286 (I did IVF and this was 11 days past a 5 day transfer—the equivalent of 16dpo). 48 hours later it was 516–so doubling time of 56 hours. 48 hours after that, it was 892, which is a doubling time of 60 hours. I was told that they look for at least a 50% increase every 48 hours.Levels of hCG and PAPP-A may be either higher or lower than “normal” in pregnancies with these chromosomal abnormalities. ... There’s a relatively slim time window during which the double ...d. dan1g1r1. Posted 01-30-20. Has anyone had a doubling time closer to 3.5 days after they passed 1200 level? Coming from another birth month group to ask you guys if this happened and went on to ...

Some researchers claim that first trimester beta-human chorionic gonadotrophin (beta HCG) levels have a constant doubling time; others suggest doubling time increases as pregnancy progresses. This study was designed to settle the debate by analysing a large series of serial serum beta HCG determinations from 143 pregnant women whose day of ... HCG doubling times Intro I am super worried. My HCG was 2095 at 19 DPO and today at 21 DPO it’s 3200. The doubling time is not 48 hours as expected. The website babymed tells me in their calculation the doubling time is 73 hours and lower then normal. But then it mentions after 1600 the doubling time is 70 to 90 hours.Doubling Time: In a healthy pregnancy, hCG levels should double approximately every 48 to 72 hours in the first weeks. High Levels: Higher-than-normal levels could indicate multiple pregnancies (twins, triplets), a molar pregnancy, or a calculation error in the pregnancy date.Microsoft Excel for Mac has several options for formatting cells to help organize information in business spreadsheets, including two types of double underlines. The first option i...Pregnancy. Why hCG Doubling Times Are Important in Early Pregnancy. Levels of hCG typically double every two to three days. Learn why they're checked and what they can tell health...I am 5 weeks pregnant but my hcg is doubling every 72 hours instead of 48. I had it checked at 18 dpo and 20 dpo and it rose 64%. I put it into the hcg calculator and it is 72 hours doubling time.For me personally however, I have found the ranges inaccurate. Anything greater than 48 hour doubling was not viable for me personally (so many others have the exact opposite experience!!) my only viable pregnancy maintained less than 48 hour doubling time past 8000 HCG. My non viable pregnancies slowed down dramatically after 1000-2000 or so.Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …Nov 2, 2012 · I am 5 weeks pregnant but my hcg is doubling every 72 hours instead of 48. I had it checked at 18 dpo and 20 dpo and it rose 64%. I put it into the hcg calculator and it is 72 hours doubling time.

Then, when it gets to over 100 to somewhere between 1200 and 1600 it should approximately double in 48 hours. After that it slows significantly to doubling over 72 hours. As it nears 10,000 there wasn't much data to support the increase timings, because doctors begin monitoring by ultrasound rather than hCG. 2.

The HCG diet is a combination of a sustained very low-calorie diet which is coupled with HCG injections (or drops) throughout the weight loss phase. The problem with the HCG diet is the duration of the calorie restriction, NOT the HCG hormone itself. The prolonged calorie restriction in the HCG diet often causes metabolic damage and thyroid ...Some researchers claim that first trimester beta-human chorionic gonadotrophin (beta HCG) levels have a constant doubling time; others suggest doubling time increases as pregnancy progresses. This study was designed to settle the debate by analysing a large series of serial serum beta HCG determinations from 143 pregnant women whose day of ...However, my GP results from 7w0d came back this morning (after baby had been seen on the scan) and showed that my HCG had only risen to 163050 from 134433. This is a 192 hour doubling time! I am panicking because my levels are taking so long to increase.Sep 2, 2023 · In pregnancy, hCG levels typically rise rapidly in the early weeks and double every 48–72 hours. The time it takes for hCG levels to double is referred to as the "hCG doubling time." This can be a useful indicator of the health of the pregnancy, as a slower or faster-than-expected hCG doubling time can be a sign of potential issues. A longer ... Does anyone have experience with HCG doubling times >150 hours? Here's the rundown: Positive HPT at 14 DPO; Ultrasound at 17 DPO showed no evidence of pregnancy; HCG levels- 17 DPO: 268 19 DPO: 327 21 DPO: 400 This puts me at a 165 hour doubling time. I've been having a hard time finding any glimmers of hope out there.The study by Stone et al., showed that the doubling times of serum β-hCG (β-t2) increased from 1.6 days on day 12, to a doubling time 3 days on day 24 after embryo transfer , suggesting that β-hCG doubled more quickly in early pregnancy. Second, the study population in our research included patients with low serum levels of β-hCG, …The Double Pinwheel Quilt Block creates a spiral withing a spiral. Download the free quilt block for your nextQuilting project. Advertisement The Double Pinwheel Quilt Block is fro...The rise did slow a lot more later on in my last pregnancy (going from 10,000 to 12,000 in almost a week). Like. 187aus. Jun 17, 2021 at 2:26 PM. after 1200 it takes 72hrs to double then after 6000 no point on checking hcg levels. read the info on …Between 1,200 and 6,000 mIU/ml serum, the hCG usually takes about 72-96 hours to double, and above 6,000 mIU/ml, the hCG often takes over four or more days to double. It makes little sense to follow the hCG values above 6,000 mIU/ml as at this point the increase is normally slower and not related to how well the pregnancy is doing.”.In the first three weeks of a normal pregnancy, the serum hCG approximately doubles every two days. The doubling time of hCG is considered a more reliable method of evaluating an early pregnancy than a single serum hCG result [2]. Serum hCG Concentration Doubling Time Days of gestation1: Expected Doubling Time (Days) 9-21 21-28 28 -36 ≤ 2.2

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The study by Stone et al., showed that the doubling times of serum β-hCG (β-t2) increased from 1.6 days on day 12, to a doubling time 3 days on day 24 after embryo transfer , suggesting that β-hCG doubled more quickly in early pregnancy. Second, the study population in our research included patients with low serum levels of β-hCG, …β-hCG values in fresh and frozen cycles were found to be significant clinical biomarkers for successful pregnancy results after IVF, enabling better clinical management of patient stress. ... Doubling time of human chorionic gonadotropin (hCG) in early normal pregnancy: relationship to hCG concentration and gestational age.Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …Mar 4, 2021 · Beta hCG levels usually double about every 2 days for the first four weeks of pregnancy. As pregnancy progresses the doubling time becomes longer. By 6 to 7 weeks beta hCG levels may take as long as 3 1/2 days to double. hCG normally reaches a peak level at about 8 to 10 weeks and then declines for the remainder of the pregnancy. The hcg levels calculator will check the doubling time between the two levels. You have to first enter the value of your first hCG test levels. Then enter value of the second hCG test levels. Mention the time gap between the two hCG tests. Then click on the ‘calculate’ button to get the results.After two miscarriages this year, I am pregnant for a third time and hoping for a sticky baby this time! Initially, I tested 48 hours apart: 3w6d: HCG= 115. 4w1d: HCG= 181. I then went in again to test a few days later because I was nervous about those numbers not doubling even though my doctor told me they don’t have to double this early on.The initial serum hCG level, which was determined at the time of the first transvaginal ultrasound examination, was below the discriminatory zone of 1000 IU/I (2nd International Standard). In 8 out of the 9 women who were ultimately diagnosed as having an ectopic pregnancy, the increase in hCG progressed only slowly, with a doubling time ...First hcg level taken was 1038 on October 6th, second was October 10th and that was 3800, third time was October 12th and it was 7260, most recent is October 14th and it’s 14237. Dr said she wants to see it doubled or more in 48 hours, but everything I’ve read and heard was that it’s ok as long as it doubles or more within 48-72 hours.Double depression occurs when you've been diagnosed with two types of depression. While symptoms may be severe, there are ways to manage them. Double depression is actually a [email protected]. 24 Hours. +91 6358888802 Direction. OVERVIEW HCG Cancer Centre, Double Road, is touted as one of Bengaluru's pioneering cancer care facilities. Established with the vision of delivering consistently excellent and outcome-driven cancer care, the centre prioritises advanced technology and patient-centred treatment approaches. ….

Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …Pregnancy Week 38. Pregnancy Week 39. Pregnancy Week 40. Pregnancy Week 41. Pregnancy Week 42. Sorry for another hcg post but after my mc I am a nervous wreck. First draw at 16 dpo 322, then to 581 at 18. 80% increase, doubling about every 56 hours. Nurse said she's seen pregnancies like this continue but honestly didn't sound …Are you the proud owner of a Maytag Gemini double oven but find yourself struggling to navigate its features? Look no further. In this comprehensive guide, we will walk you through...The average doubling time for HCG levels during the first 6 weeks from conception (8 weeks gestational age) is 1.94 days. 1 This increases to an average of 4.75 days between 6 and 8 weeks from conception (8 to 10 weeks gestational age) 1; HCG levels then begin to plateau, reaching an average peak of about 100 000 IU/L before declining and ...This calculator will determine your doubling time and compare it to the average. Slow Rising hCG Levels. In some healthy pregnancies, the beta hCG level does not double every 48 hours. However, this is not necessarily a cause for concern. Many women have had low hCG levels and have gone on to have healthy pregnancies.Normal hCG Doubling Time And How Often Does hCG Double? hCG doubles every 48 to 72 hours in early pregnancy, and there will be no normal hCG value in the …[email protected]. 24 Hours. +91 6358888802 Direction. OVERVIEW HCG Cancer Centre, Double Road, is touted as one of Bengaluru's pioneering cancer care facilities. Established with the vision of delivering consistently excellent and outcome-driven cancer care, the centre prioritises advanced technology and patient-centred treatment approaches.Some researchers claim that first trimester beta-human chorionic gonadotrophin (beta HCG) levels have a constant doubling time; others suggest doubling time increases as pregnancy progresses. This study was designed to settle the debate by analysing a large series of serial serum beta HCG determinations from 143 pregnant women whose day of ... Hcg double time, Doubling time slows after a certain level. My first draw was 1288 and my second was 3110. A doubling time of 57 hours. I believe most people say after 1200, doubling time is between 72-90 hrs. Even at the beginning doubling time is 48-72 hours and you’re still within that. I’ve had 3 ultrasounds with strong hear rates and I’m currently 10+5., [email protected]. 24 Hours. +91 6358888802 Direction. OVERVIEW HCG Cancer Centre, Double Road, is touted as one of Bengaluru's pioneering cancer care facilities. Established with the vision of delivering consistently excellent and outcome-driven cancer care, the centre prioritises advanced technology and patient-centred treatment approaches., thorsenme. I went through IVF with this pregnancy and one previous pregnancy. My fertility nurse said they want HCG to double every 72 hours, or increase by 60% every 48 hours. Mine only increased by 53% after 48 hours the first time, but increased by more than 60% after the next 48 hours. She said that “doubling every 48 hours” is a …, Assessment: The Two-Day hCG rise was 96 % and is considered adequate. First hCG: 286 mIU/ml Second hCG: 560 mIU/ml hCG Difference: 274 mIU/ml Time Difference: 48 hours Total hCG Increase: 0.96 % (2) Daily Rate Increase: 40 % (1.4) Two Day Rate Increase: 96 % (1.96) 1st Day hCG As If: 400 mIU/ml 2 Days hCG As If: 560 …, Commonly, in early pregnancy, the β-hCG will double every 31 to 72 hours. As the pregnancy progresses, levels rise and the doubling time increases. hCG may be detected by urine home pregnancy tests with sensitivity of 15 to 25 mIU, by quantitative blood test or by qualitative blood test., In the diagnosis of early pregnancy failure, the HCG doubling time is a superior diagnostic parameter compared to the HCG ratio, with similar sensitivity but better specificity.HCG levels rise during the first 6 - 10 weeks of pregnancy then decline slowly during the second and third trimesters.At an hCG level below 1,200 mIU/ml, the hCG usually ..., Use this calculator to calculate the doubling time of two beta hCG samples by entering the values of the blood tests and the date and time of each test. Enter your test dates & times and beta hCG values below: Date & Time. of First Beta. :00., When it comes to email marketing, is double opt in a risk? Not really! It’s actually a great, long-term way of building a healthy mailing list. “I get more subscribers when I use s..., Doubling Times: Your Betas: HCG Information: Site Info: Chat: Beta Scores -- Single Pregnancy: ... Doubling Time Calculator: Add New Pregnancy: Update Existing Pregnancy:, I tracked my ovulation using FF and Premom using OPKs and bbt, and am 13/14 dpo today. (So I am certain it’s not actually hcg rising from the last pregnancy). My betas so far have doubled nicely, and I am going to keep going every 48 hrs (hoping for a scan at 5-6 weeks): 10/11 dpo - 29. 12/13 dpo - 94., hCG levels before pregnancy. hCG hormone is commonly associated with pregnancy but is also detectable in the colon, liver, and pituitary gland in small concentrations before you conceive. Average hCG levels: Less than ten mIU in non-pregnant women. 10 to 25 mIU for a ‘borderline’ pregnancy result. More than 25 mIU for a positive result., We are in a wait-and-see scenario. I had my hcg tested last week 48 hours apart. The first was 251 and the second was 443. So it went up 75%, or 58* (edit) hour doubling. I know that the ideal range is 48-72 hours but my doctor was very cautious and not so optimistic when she explained my numbers. During my last pregnancy my hcg almost tripled ..., Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …, We would like to show you a description here but the site won’t allow us., Assessment: The Two-Day hCG rise was 96 % and is considered adequate. First hCG: 286 mIU/ml Second hCG: 560 mIU/ml hCG Difference: 274 mIU/ml Time Difference: 48 hours Total hCG Increase: 0.96 % (2) Daily Rate Increase: 40 % (1.4) Two Day Rate Increase: 96 % (1.96) 1st Day hCG As If: 400 mIU/ml 2 Days hCG As If: 560 …, What about hCG doubling time with twins? In a twin pregnancy, hCG will most likely increase at a similar pace to a single pregnancy. The only difference is that the base level for a twin pregnancy will likely be much higher. This means that in the first four to six weeks after implantation, you can expect hCG to double every two days. Until ..., Some researchers claim that first trimester beta-human chorionic gonadotrophin (beta HCG) levels have a constant doubling time; others suggest doubling time increases as pregnancy progresses. This study was designed to settle the debate by analysing a large series of serial serum beta HCG determinations from 143 pregnant women whose day of ..., The hCG doubling time, over two separate blood tests taken days apart, usually provides more useful information than a single hCG level. How to Calculate Your hCG Levels ., Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a ..., 41. 26500. 62000. 117400. 42. 28000. 65000. 128200. Beta hCG database, levels chart, scatter plot and doubling time calculator by days after ovulation, IVF embryo transfer and missed period in early pregnancy., Doubling times for hCG are a good way to check whether a fertilized eggs is progressing normally in early pregnancy.Slow-rising hCG doubling times can be a possible sign of miscarriage or symptom of ectopic pregnancy. but if yours is rising slower, don't panic quite yet. Because women with low numbers can go on to have a normal pregnancy and a …, hCG levels double after every few days for the first four to six weeks after becoming pregnant. After that, it doubles after three to four days until the sixth week. Then, around …, According to Mayo Medical Laboratories, the level of human chorionic gonadotropin will fall to half of its pregnancy concentration in the body within 24 to 36 hours of birth, misca..., Jul 8, 2020 · 32,000–210,000. 13–16. 9,000–210,000. 16–29. 1,400–53,000. 29–41. 940–60,000. During the first 8 weeks of pregnancy, concentrations of hCG in the blood and urine usually double every ... , In a viable intrauterine pregnancy with an initial β-hCG level less than 1,500 mIU per mL (1,500 IU per L), there is a 99% chance that the β-hCG level will increase by at least 49% over 48 hours ..., After two miscarriages this year, I am pregnant for a third time and hoping for a sticky baby this time! Initially, I tested 48 hours apart: 3w6d: HCG= 115. 4w1d: HCG= 181. I then went in again to test a few days later because I was nervous about those numbers not doubling even though my doctor told me they don’t have to double this early on., Oct 1, 2013 · For an HCG doubling time of > 2.9 hours, the sensitivity was 72%, the specificity 99% and the LR+ 72. Conclusions. The model indicates that in the diagnosis of early pregnancy failure, the HCG doubling time is a superior diagnostic parameter compared to the HCG ratio, with similar sensitivity but better specificity. , Two β-hCG parameters were examined in relation to live birth: 1) "doubling" defined as β-hCG doubling over 48 h and 2) "reaching 100" defined as a β-hCG ≥ 100 mIU/mL by 15 days after oocyte retrieval (AOR). Results: One thousand three hundred forty cycles involving a single embryo were analyzed. Two thirds were frozen embryos and 86% were ..., HCG levels rise quickly and exponentially, usually doubling every 2 days 3,4 in the first weeks before reaching a steady level (plateau) around week 10, after which time they slowly decline. HCG level during pregnancy: Does a high hCG level mean pregnancy?, Assessment: The Two-Day hCG rise was 96 % and is considered adequate. First hCG: 286 mIU/ml Second hCG: 560 mIU/ml hCG Difference: 274 mIU/ml Time Difference: 48 hours Total hCG Increase: 0.96 % (2) Daily Rate Increase: 40 % (1.4) Two Day Rate Increase: 96 % (1.96) 1st Day hCG As If: 400 mIU/ml 2 Days hCG As If: 560 …, In the diagnosis of early pregnancy failure, the HCG doubling time is a superior diagnostic parameter compared to the HCG ratio, with similar sensitivity but better specificity.HCG levels rise during the first 6 - 10 weeks of pregnancy then decline slowly during the second and third trimesters.At an hCG level below 1,200 mIU/ml, the hCG usually ..., For an HCG doubling time of > 2.9 hours, the sensitivity was 72%, the specificity 99% and the LR+ 72. Conclusions. The model indicates that in the diagnosis of early pregnancy failure, the HCG doubling time is a superior diagnostic parameter compared to the HCG ratio, with similar sensitivity but better specificity., For an HCG doubling time of > 2.9 hours, the sensitivity was 72%, the specificity 99% and the LR+ 72. Conclusions. The model indicates that in the diagnosis of early pregnancy failure, the HCG doubling time is a superior diagnostic parameter compared to the HCG ratio, with similar sensitivity but better specificity.