Hcg levels twins 4 weeks

0. Jun 24, 2013. #1. I haven't seen the doc yet, just received a call from the nurse with my blood test results. She said my HCG levels are very low at 54. She said I'm only just 4 weeks and usually they range from 20-900 so I'm on the low end. I don't know what that means and I'm panicking that it means I'm going to miscarry.

Hcg levels twins 4 weeks. My numbers are similar to yours but for a 5 day embryo. 10dp5dt was 212 and 12dp5dt was 703. Will have first ultrasound next week. Those are good! Mine at the equivalent (9dp5dt and 11dp5dt) were 81.5 and 231. Resulted in a live birth. Mine was well over 30,000 but I had twins! Those are great strong levels!

5 Weeks Pregnant with hCG levels in the 5000 range. n. Nickabee24. Posted 09-11-09. After trying to get pregnant for 14 months, I took a hpt last week and it came back positive. I then went to my ...

I think at 4+2 days my HCG was at 700 and my doubling time was about 30 hours. So by 4+4 they would have been around the same as yours. We have confirmed there’s only one baby in here. 4. -breadstick-. • 5 yr. ago. Some people just have high levels; I’m one of them. Here are my numbers from this pregnancy.The typical hCG level around four weeks of pregnancy is around 140 mIU/ml 5, so a high hCG level can be generally considered to mean you are pregnant. However, there are some very rare medical conditions that can cause high hCG levels. If you get a positive result on a pregnancy test and you haven’t had unprotected sex since your last ...Higher than average hCG levels might indicate that you’re having twins or triplets, but you’ll need an ultrasound scan to confirm this. “A normal blood level for hCG on the day a period is due (14 days after …Blood tests also require lower hCG levels to detect a pregnancy, as explained below: Blood tests. Pregnancy blood tests can detect hCG hormone levels as low as 5 to 10 mIU/mL. Urine tests. At-home urine tests require higher levels of hCG to detect a pregnancy, typically at least 20 mIU/mL. If your test is positive, contact your GP or a midwife ... Human Chorionic Gonadotropin. Human chorionic gonadotropin (hCG) is a hormone produced by the placenta during pregnancy. It helps thicken a person’s uterine lining to support a growing embryo and tells the body to stop menstruation. HCG levels rise after conception and continue to rise until about 10 weeks in pregnancy. This pregnancy at 4 weeks 3 days my level was 454. Just one baby. With my twin girls, Di/Di, their levels at 4 weeks 2 days was 114. At 4 weeks 4 days was 258. At 5 weeks the level was 5,000. Levels do not indicate sex, or multiples. Only an ultrasound canHey guys! I am currently 4 weeks today and got a blood draw yesterday at 3 weeks and 6 days. The HCG level came back as 163. Do y'all think that is a good level for where I am? I'm not sure if that's too low or if it is just right! My fertility doctor likes to see over 100 at 4 weeks but what matters more is the doubling rate.When you take a home pregnancy test, it's looking for hCG levels of at least 20 milli-international units per milliliter (mUI/mL), which most women have in their urine around weeks 4 or 5 in a singleton pregnancy. (A non-pregnant woman's hCG levels are less than 5 mIU/mL, as a comparison.)

The typical hCG level around four weeks of pregnancy is around 140 mIU/ml 5, so a high hCG level can be generally considered to mean you are pregnant. However, there are some very rare medical conditions that can cause high hCG levels. If you get a positive result on a pregnancy test and you haven’t had unprotected sex since your last ...The typical hCG level around four weeks of pregnancy is around 140 mIU/ml 5, so a high hCG level can be generally considered to mean you are pregnant. However, there are some very rare medical conditions that can cause high hCG levels. If you get a positive result on a pregnancy test and you haven’t had unprotected sex since …An hCG level of less than 5 mIU/mL is considered negative for pregnancy, and anything above 25 mIU/mL is considered positive for pregnancy. An hCG level between 6 and 24 …Aug 4, 2020 at 9:01 PM. At 5 weeks (I’m now 9 weeks 4 days) my HCG levels were almost 10,000. Haven’t had my first ultrasound yet but twins run in my family too. Everyone keeps saying twins but I’m only 18, I don’t think I could handle that just yet . Like.Levels are typically higher when carrying twins. Quantitative hCG measurement is reported in milli-international units per milliliter (mIU/mL). ... hCG Range (mIU/mL) 3 weeks: 5–72 : 4 weeks: 10 ...Do twins run in your family? The chance of having twins can be affected genetics and other factors. Learn more about twins and genetics. The likelihood of conceiving twins is a com...

Understanding the normal HCG readings for twins is an important part of being able to analyze the hcg levels chart for twins more accuratelyl Counting from the week of your last menstrual cycle, normal HCG levels for the third week will reflect at between 5 – 50 mlU/ml; while the sixth week will see that reading rise up to 1080 – …At 4 weeks of pregnancy, or 2 weeks after ovulation, HCG levels in a normal pregnancy typically fall between 10 and 750 mIU/mL, according to the website Perinatology.com. However, expected ranges may vary somewhat from one testing laboratory to another. If you're having more than one baby, your HCG level will often be …Oct 21, 2022 · For a single baby, HCG level varies from 70 to 750 mIU/mL. When it comes to twins, the normal HCG levels during the early stages of pregnancy is about 30% to 50% higher than in a single pregnancy. This is somewhere around 200 to 1750 mIU/ML. When a woman is pregnant with multiples, HCG levels will be particularly high because of each developing ... Levels of hCG start to increase after implantation and rise every 39–53 hours in the first few weeks of pregnancy. With twin pregnancies, hCG levels can be 30% to 50% higher than those where ...Mar 30, 2024 · My HCG level with my twins at 4 weeks (4+0) exactly was 300 and two days later at 4+2, it hadn’t quite doubled but had risen to 560. If you haven’t read it – I’ve shared all about how my initial beta levels didn’t double yet I was still carrying twins here .

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Pregnancy > Your Health. Early hCG Levels and Twin Possibilities. by Heidi Murkoff. Medically Reviewed by Shannon Smith, M.D. | November 17, 2022. Twenty20. Can hCG levels tell you whether or not you're having twins right away? Here's what that early pregnancy test can — and can't — tell you. mikaylanicole3760. Aug 4, 2020 at 9:01 PM. At 5 weeks (I’m now 9 weeks 4 days) my HCG levels were almost 10,000. Haven’t had my first ultrasound yet but twins run in my family …Twin hCG levels. How often are hCG levels checked during pregnancy? ... I went in and got blood work my hcg levels were 57481 at 5 weeks and 6 days then 48 hours later retested and at 6 weeks 1 day levels are 92345 also did a ultrasound and baby measures 6 weeks and 1 day as well and had a heartbeat couldn’tbe heard but seen …Melly_sob. Sep 13, 2017 at 4:03 AM. So I had blood drawn at 3 weeks and my hcg was 91 this was through my family Dr. then i finally had my first prenatal visit yesterday and he sent me for blood just to see where I'm at with my hcg and I'm at 531. I'm supposed to be 5+3 today so now I'm worried. waiting for Dr office to call today to tell me ...

In the first 4 weeks of a viable pregnancy, hCG levels generally double every 48 to 72 hours. After this, the hCG levels should grow more slowly doubling approximately every 96 hours... At that hcg level they would be able to see the sac in your uterus. If they do see it there that’s a good sign. I had two episodes of spotting early in my pregnancy and turned out to be nothing. It’s more common than you think. I’m currently 28 weeks and my pregnancy has been very healthy since. Good luck hun.The typical hCG level around four weeks of pregnancy is around 140 mIU/ml 5, so a high hCG level can be generally considered to mean you are pregnant. However, …At 4 weeks, the range is about 5 – 426 mIU/mL. By 6 weeks, levels might rise to between 1,080 – 56,500 mIU/mL. These broad ranges acknowledge that "normal" varies greatly from one individual to another. Elevated hCG levels may indicate several situations or conditions: Multiple pregnancies (twins or triplets). A miscalculated date of ...Extremely high hcg at 4 weeks. R. Rebekah1978. Feb 2, 2017 at 11:37 AM. I am so scared right now. I thought I was 6 weeks 4 days on 1/31...had u/s that day and baby (only 1) measured 6 weeks exactly. That means my beta drawn 2 weeks prior was 1187 for 4 weeks and 5096 for 4 weeks 2 days.Oct 10, 2009 at 5:36 PM. @MrsCramer2u, Like the previous posters have said, hCG levels aren't a reliable indicator for multiples. In a normal healthy pregnancy hCG levels should at least double every 48 hours. When I was pregnant my numbers were within normal range and I was carrying twins.The secrets of a healthy twin pregnancy with our comprehensive guide on HCG Levels for Twins. Navigate the nuances, risks & proactive strategies. Menu; Wishlist; Twins Blog TWIN PREGNANCY. Getting Pregnant; ... hCG Levels By Week for Twins. Weeks of Pregnancy Average hCG Level (mIU/mL) 3-4 Weeks: 5-426: 4-5 Weeks: 19 …Hey guys! I am currently 4 weeks today and got a blood draw yesterday at 3 weeks and 6 days. The HCG level came back as 163. Do y'all think that is a good level for where I am? I'm not sure if that's too low or if it is just right! My fertility doctor likes to see over 100 at 4 weeks but what matters more is the doubling rate. HCG Levels for Twins at 4 Weeks By the 4-week mark, your hCG levels will have been doubling around every 48 to 72 hours and will normally continue to do so until you hit 6 weeks. Just know that at this very early stage in pregnancy, hCG levels will generally be quite low (in singleton or twin cases), and a rapid rise may not be detected until ... Jan 4, 2017 · The average hCG level for singleton is 1721, while average twins hCG value is 3446 miu/l. Although, you can’t expect twins just because your hCG Blood test result is above the average i.e. 3400 at 5 weeks LMP, while hCG 20000 or higher at 5 weeks have the highest chance of having twins. Experts have found a huge variation in hCG levels on even the first missed day of a woman's period. Some women have almost no measurable hCG, while others have readings of more than 400 milli-international units per milliliter (mIU/mL). And hCG levels with twins tend to be much higher than with singletons.So my hcg levels at 4 weeks were 876. is that high!? Could this be twins!? I'm off to the OB this Thursday for 8 week scan ( 1 st scan) slightly worried this is high!?! ... Mine were 1270 at 4 weeks, high range is 900 odd so my doc thought I was either a week ahead or having twins and neither was the case. o. Opli. Posted 06-03-17. Possibly but ...

Summary. hCG is a hormone that plays an important role in pregnancy, and levels can vary widely at this time and between individuals. Outside pregnancy, a high …

All the comparisons show my hcg is high so likely twins but my First scan is in 3 weeks. Yes, with twins. What is your level? I had 420 at 10dp5dt, Todays (16dp5dt, equivalent to 21dpo) beta shows 4,800, so at 5+2 i Should be 9,600ish...This is the reason that women pregnant with twins or triplet experience more nausea and vomiting because of higher hCG levels as compared to singleton pregnancies. 9. Non pregnant rise of hCG ... hCG levels can take up to 4-6 weeks to become negative after delivery or miscarriage. If urine pregnancy test is done during this …Fraternal twins run on the maternal side of your family. If your mother or grand mother or great grandmother had fraternal twins it's likely you could too. Identical twins are random. My hcg levels were at 19,000 at 3 weeks past ovulation. I am also scared I'm having twins. ( maternal grandmother is a twin).HCG LEVELS FOR TWINS AT 5 WEEKS allgood427. I am exactly 5 weeks pregnant after an IVF cycle. We transferred 2 embryos and our beta today was 7,073. ... At 4 weeks hcg was 900. Today is the start of my 5th week at the end of the week I'll go for my first US. This was a FET, the fresh didn't work. We transfer 3 in, fresh only one. ...In the first 4 weeks of a viable pregnancy, hCG levels generally double every 48 to 72 hours. After this, the hCG levels should grow more slowly doubling approximately every 96 hours...My numbers are similar to yours but for a 5 day embryo. 10dp5dt was 212 and 12dp5dt was 703. Will have first ultrasound next week. Those are good! Mine at the equivalent (9dp5dt and 11dp5dt) were 81.5 and 231. Resulted in a live birth. Mine was well over 30,000 but I had twins! Those are great strong levels!If your hCG level is higher than 25 mIU/ml you’ll get a positive pregnancy test . Since levels double every 48-72 hours in the first trimester, the hCG levels should continue to rise. Though the ranges below are not absolute, it’s a good reference point for a single pregnancy. (More on twins below!)Aug 5, 2020 · Aug 4, 2020 at 9:01 PM. At 5 weeks (I’m now 9 weeks 4 days) my HCG levels were almost 10,000. Haven’t had my first ultrasound yet but twins run in my family too. Everyone keeps saying twins but I’m only 18, I don’t think I could handle that just yet . Like.

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Down Syndrome+HCG levels. Last week I went for my US. They measured the NT at 1.42mm and good nasal bone. Report said healthy baby. Then the results for my blood came back with 4.7 in beta HCG which apparently is too high. They combined my age (34 now but 35 at baby's birth) plus the US results plus the HCG results to give me a …My numbers are similar to yours but for a 5 day embryo. 10dp5dt was 212 and 12dp5dt was 703. Will have first ultrasound next week. Those are good! Mine at the equivalent (9dp5dt and 11dp5dt) were 81.5 and 231. Resulted in a live birth. Mine was well over 30,000 but I had twins! Those are great strong levels!Mine at 5w5d was 70,871 with twins. So crazy high. I didn’t check but my first draws were 25,82, and 188 so not ridiculously high to start with around 4 weeks. Your levels seem completely normal so me they double about every 48 hours and yours is slightly above that.In the first 4 weeks of a viable pregnancy, hCG levels generally double every 48 to 72 hours. After this, the hCG levels should grow more slowly doubling approximately every 96 hours...HCG levels are measured using MIU/ML, which means milli-international units per millilitre. A singleton pregnancy HCG range typically reaches between 25,700 and 288,000 MIU/ML at the 9 – 12 week mark. A pregnancy with twins may display higher levels than this at the same stage. You can find a HCG levels chart online.Signs of Having Twins at 5 Weeks. Higher-than-normal levels of hCG may indicate that you’re pregnant with multiples, but you’ll need to wait until your ultrasound for 100% certainty. Common early pregnancy symptoms of fatigue, frequent urination, breast tenderness, and food cravings are extra EXTRA — your symptoms are WAY more …hCG levels after week 10. "This means that at the beginning of pregnancy, your hCG number (measured in mIU/ml or IU/l ) might be 2. It'll then move to 4, 8, and 16, and then it really picks up ...Understanding the normal HCG readings for twins is an important part of being able to analyze the hcg levels chart for twins more accuratelyl Counting from the week of your last menstrual cycle, normal HCG levels for the third week will reflect at between 5 – 50 mlU/ml; while the sixth week will see that reading rise up to 1080 – 56500 mlU ...Gas prices go down to March's level, providing relief to small businesses that have been dealing with unusually high prices at the pump. Average gasoline prices in the US have fall... ….

Jan 18, 2012 · Understanding the normal HCG readings for twins is an important part of being able to analyze the hcg levels chart for twins more accuratelyl Counting from the week of your last menstrual cycle, normal HCG levels for the third week will reflect at between 5 – 50 mlU/ml; while the sixth week will see that reading rise up to 1080 – 56500 mlU ... It’s been 40 years to the day since the Voyager mission commenced with the launch of Voyager 1 on September 5, 1977, with its twin Voyager 2 launching two weeks later. This groundb...I also didn’t have particularly high HCG levels. One of my cycle buddies had like triple the levels I had and was only having a single baby. My betas: 8dp5dt or 3 weeks 6 days: 187 11dp5dt or 4 weeks 2 days: 596 18dp5dt or 5 weeks 2 days: 10,435 Fraternal/Di Di twinsSymptoms of miscarrying one twin, which is known as vanishing twin syndrome, include mild cramping, pain in the pelvic region, vaginal bleeding and a decrease in the level of human...Curious what your levels have been if your doctors are monitoring them for you and how far along everyone is.Here are my stats! Lol I’m definitely reading too much into how high they seem, but it’s all in good fun.9/13: 3679/15: 764 [208% rise]9/20: 5,798 [759% rise] (measuring 5 weeks + 4 days per US)Next...1400-53000 mIU/ml: 16-19 weeks of pregnancy (2nd trimester) 940-60000 mIU/ml: 19-41 weeks of pregnancy (3rd trimester) Normal hCG levels in pregnancy chart. It is important to keep in mind …Aug 26, 2022 · The hCG can rise manyfold even without twins. How does hCG normally increase? In most normal pregnancies at hCG levels below 1,200 mIU/ml, the hCG level usually doubles every 48-72 hours, and it normally increases by at least 60% every two days. In early pregnancy, a 48-hour increase of hCG by 35% can still be considered normal. As your ... The level will reach its peak in the first 8-11 weeks of pregnancy and then will decline and level off for the remainder of the pregnancy. What You Need to Know About Your hCG Levels: As you get further along in … Hcg levels twins 4 weeks, Let's get technical with this week's Crowdhacker. If you're a sysadmin or just a network enthusiast, you might know something about virtualization. But what's the difference betwee..., Twin-to-twin transfusion syndrome is a rare condition that occurs only in identical twins while they are in the womb. Twin-to-twin transfusion syndrome is a rare condition that occ..., HCG levels are measured using MIU/ML, which means milli-international units per millilitre. A singleton pregnancy HCG range typically reaches between 25,700 and 288,000 MIU/ML at the 9 – 12 week mark. A pregnancy with twins may display higher levels than this at the same stage. You can find a HCG levels chart online., In the first 4 weeks of a viable pregnancy, hCG levels generally double every 48 to 72 hours. After this, the hCG levels should grow more slowly doubling approximately every 96 hours..., HCG Screenings to Test for Multiple Pregnancies. In some cases, higher levels of HCG could indicate that a person is pregnant with twins or multiples. However, this is not always the case. Doctors can perform blood tests to screen for HCG levels during the first trimester. If you're worried about your HCG levels or want to determine the odds ... , hCG levels with Twins or multiples vary exponentially. What is hCG Doubling time? hCG doubling time refers to hCG levels doubling every 48 -78 hours …, At 3 weeks 3 days mine were 167, and Then at 3 weeks 5 days they were 487. Had some spotting which was scary but has now stopped thankfully and doctor said cause my hcg levels more than doubled in 48 hours I am fine., 4. In Miscarriage Support. 2 miscarriage fetus has been dead for 4 weeks now without passing tissue. April 30, 2024 | by Judyboom3. I just found out I missed carried again. Found out at 9.3 weeks but fetus has only gone 6.1. I …, At that hcg level they would be able to see the sac in your uterus. If they do see it there that’s a good sign. I had two episodes of spotting early in my pregnancy and turned out to be nothing. It’s more common than you think. I’m currently 28 weeks and my pregnancy has been very healthy since. Good luck hun., GM stock is in the spotlight today as General Motors gets ready to unveil its Chevrolet Silverado E truck. Where is the automaker going next? Wedbush says the Silverado E is 'not y..., I also didn’t have particularly high HCG levels. One of my cycle buddies had like triple the levels I had and was only having a single baby. My betas: 8dp5dt or 3 weeks 6 days: 187 11dp5dt or 4 weeks 2 days: 596 18dp5dt or 5 weeks 2 days: 10,435 Fraternal/Di Di twins, This hCG levels chart shows typical hCG levels by week throughout pregnancy Advertisement 3 weeks LMP 5-50 mIU/mL 4 week LMP 5-456 mIU/mL 5 weeks LMP 18-7,340 mIU/mL 6 weeks LMP 1,080-56,500 mIU/mL 9 to 12 weeks LMP 25,700-288,000 mIU/mL 13 to 16 weeks LMP 13,300 to 254,000 mIU/mL 17 to 24 weeks LMP 4,060 to 165,400 mIU/mL 25 to 40 weeks LMP ..., HCG Levels for Twins at 4 Weeks. By the 4-week mark, your hCG levels will have been doubling around every 48 to 72 hours and will normally continue to do so until you hit 6 weeks. Just know that at this very early stage in pregnancy, hCG levels will generally be quite low (in singleton or twin cases), and a rapid rise may not be detected until ..., my hcg for 5 weeks 1 day was 12000. there are ranges but honestly everyone is different. and every pregnancy is different. it's not one size fits all. however they do say that high hcg could be indicative of twins., At 13dpo my hcg was 57 and 3 days later was 399 so not a massive rise-definitely didn't suspect twins from it. My Pregesterone numbers were 52.5 at cd22 and remained in high 60s in first weeks of pregnancy. It wasn't until the 7 week ultrasound that we were told-and we were both shocked so you just never know., hCG levels after week 10. "This means that at the beginning of pregnancy, your hCG number (measured in mIU/ml or IU/l ) might be 2. It'll then move to 4, 8, and 16, and then it really picks up ..., I was 84 at exactly 4 weeks and 340 at 4 weeks and three days. The doctor said, "this is very appropriate" and scheduled my ultrasound for 6 weeks. At 4 weeks and 2 days my number was 430, 4 weeks 4 days 860, 5 weeks 2180. As long as the number is doubling every 48 to 72 hours, its normal and pregnancy is progressing., , If your hCG level is higher than 25 mIU/ml you’ll get a positive pregnancy test . Since levels double every 48-72 hours in the first trimester, the hCG levels should continue to rise. Though the ranges below are not absolute, it’s a good reference point for a single pregnancy. (More on twins below!), 13 - 16 weeks. 9,000 - 210,000 µ/L. 16 - 29 weeks (second trimester) 1,400 - 53,000 µ/L. 29 - 41 weeks (third trimester) 940 - 60,000 µ/L. Higher than expected hCG levels may happen if you’re are pregnant with twins and triplets. It may also happen if you have an abnormal growth in your uterus (womb). Falling hCG levels may show a ..., At that hcg level they would be able to see the sac in your uterus. If they do see it there that’s a good sign. I had two episodes of spotting early in my pregnancy and turned out to be nothing. It’s more common than you think. I’m currently 28 weeks and my pregnancy has been very healthy since. Good luck hun., HCG Screenings to Test for Multiple Pregnancies. In some cases, higher levels of HCG could indicate that a person is pregnant with twins or multiples. However, this is not always the case. Doctors can perform blood tests to screen for HCG levels during the first trimester. If you're worried about your HCG levels or want to determine the odds ..., Human Chorionic Gonadotropin. Human chorionic gonadotropin (hCG) is a hormone produced by the placenta during pregnancy. It helps thicken a person’s uterine lining to support a growing embryo and tells the body to stop menstruation. HCG levels rise after conception and continue to rise until about 10 weeks in pregnancy., 0. Jun 24, 2013. #1. I haven't seen the doc yet, just received a call from the nurse with my blood test results. She said my HCG levels are very low at 54. She said I'm only just 4 weeks and usually they range from 20-900 so I'm on the low end. I don't know what that means and I'm panicking that it means I'm going to miscarry., I just had my numbers taken today at 5 weeks 4 days and they were over 40,000. Confirmed twins on ultrasound. At around 7 weeks (give or take a few days since the ultrasound edd didn’t match my lmp) my hcg levels were at 108,133. The ultrasound confirmed mo/di twins. I was 51000 at 6 weeks, having fraternal twins!, They test early, so a low score is likely. But what matters is how HCG levels rise. 85 per cent of viable pregnancies double as they should. 4. Plan your scan. The best way to check on your pregnancy is to have an ultrasound scan. By 6.5 weeks, your HCG levels should be at least 2,000 mIU/ml – and probably higher., An hCG level of less than 5 mIU/mL is considered negative for pregnancy, and anything above 25 mIU/mL is considered positive for pregnancy. An hCG level between 6 and 24 …, I found out at 8 weeks that I was having twins but only know my 16dpo hcg numbers and they were 1800. Hindsight - it was clearly twins. Haha. 23dpo progesterone was 20. 4w1d HCG was 250 and progesterone was 64. 4w3d HCG was 568 progesterone was not retested. 6w5d u/s showed twins. I'm still shocked., HCG levels rise quickly and exponentially, usually doubling every 2days 3,4 in the first weeks before reaching a steady level (plateau) around week 10; after which time they slowly decline. 4. What should hCG levels be at four weeks of pregnancy? On average, the hCG level at four weeks of pregnancy, is around 140 mIU/ml 5. However, …, 15 DPO (4) = hcg 476. 17 DPO (4+2) = hcg 1240. Thanks 🌈🌈🙏🏻 ️. comments. Best. Add a Comment. sad-nyuszi • 5 mo. ago. My levels were over 1700 at 4w0d! Now I'm almost 19w with one one healthy boy :), Keep in mind that, if you want your hCG blood test results explained in more detail, your healthcare provider is the best person to ask. Pregnancy week. Range of hCG levels in milli-international units per milliliter (mIU/mL) 3 weeks. 5–72 mIU/mL. 4 weeks. 10–708 mIU/mL. 5 weeks. 217–8,245 mIU/mL., Twin-to-twin transfusion syndrome is a rare condition that occurs only in identical twins while they are in the womb. Twin-to-twin transfusion syndrome is a rare condition that occ..., The levels peak around eight to 10 weeks of pregnancy and then start to decline. The hCG levels can be detected in the urine as early as 10 days after conception. How dark should a pregnancy test line be at 4 to 5 weeks with twins. When you have a dark line on pregnancy test, it means twin pregnancy.