![]() More frequent scans may be required if any medical concerns arise during your pregnancy, and this will be discussed with you.Welcome to /r/Twins! Please share your stories, thoughts, and pictures of your experiences going through life as a twin!.An ultrasound at 11-14 weeks is recommended to assess each of the baby’s early anatomy and nuchal translucency, (if you consent).Incidentally, 90% of monoamniotic twins are female. In addition, MCMA twins have a greater rate of fetal abnormality, preterm birth, cord entanglement and perinatal death. These twins also have a shared placenta with an increased risk of unequal growth and TTTS, although this is less common than with MCDA twins. Monochorionic monoamniotic twins (MCMA) are rare and account for 1% of monochorionic twins. More frequent scans may be required if any medical concerns arise during your pregnancy (Link to Maternity – Management of Monochorionic Twin Pregnancy ()).Regular ultrasound scans from 16 weeks of pregnancy every 2 weeks to monitor the babies’ growth, well-being and signs of TTTS or TAPS.At 18-20 weeks, a fetal morphology scan is performed.An ultrasound at 11-14 weeks is recommended to assess each of the baby’s early anatomy and nuchal translucency if you consent.This is important to determine the number of chorion and amnion membrane layers. The additional scans recommended by Ultrasound Care’s clinicians are: In this condition one twin becomes anaemic whilst the other twin receives extra blood and becomes polycythaemic. ![]() TAPS (twin anaemia polycythaemia syndrome) is a rare form of transplacental blood transfusion from one twin to another. TTTS is then staged using the Quintero Classification System. The condition is diagnosed on antenatal ultrasound by the finding of too little amniotic fluid in one sac and too much in the other or changes in the blood flow patterns in the babies. TTTS occurs when there is unequal sharing of blood between the babies across the placental anastomoses and occurs in 10-15% of monochorionic twin pregnancies. This is a more complex pregnancy and increased ultrasound monitoring is recommended to ensure both babies are growing well and to screen for the development of twin-to-twin transfusion syndrome (TTTS) or twin polycythaemia anaemia sequence (TAPS). There are vascular connections between the two babies’ circulations. ![]() When a single chorionic develops, this causes a single, shared placenta to develop. Both babies will be the same gender and they are always identical. Please allow plenty of time for your scans and don’t forget to let our care team know if you need a break during the scan.Ī monochorionic twin pregnancy is one in which both babies share a chorion. Your health, and your babies’ health is important to us, and that takes time to assess. When you book your scans, once we have identified a multiple pregnancy, we ask you to remind our admin team that you are having twins each time you book so that we can ensure we give you all the time you and your babies need for your scan. Remember, each of these scans will take twice the amount of time, as we need to look at both babies. As mentioned in the opening paragraph of this article, as you are having two pregnancies at once, there is also an increased chance of pre-term labour, growth and structural problems, so it is important that both or all babies are assessed carefully and in detail. You may feel more nauseous, have a higher chance of becoming anaemic and of developing issues with blood pressure and diabetes in pregnancy. Carrying twins has implications for both you and your babies. ![]()
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