BabyCenter: Twin Fetal Development Series
image: BabyCenter
"This week, your babies (at the beginning stage of blastocysts) will implant into your uterine wall and develop into embryos. The placenta, amniotic sac, and yolk sac will begin developing to support your babies."
"At 8 weeks pregnant with twins, you've likely seen (or will soon see) your babies on an ultrasound. Pregnancy symptoms at this time include morning sickness, bloating, food cravings or distaste, fatigue, breast changes, frequent urination, and increased vaginal discharge."
Your babies are growing and developing very quickly at this stage of pregnancy. They have faces, limbs, and organs now and they're taking up your entire uterus, which can now be felt by your provider above your pubic bone.
"You're 16 weeks pregnant with twins and in the second trimester of pregnancy! You may be experiencing new symptoms, and are hopefully feeling better overall if you had morning sickness or nausea in the first trimester. Your twins are changing rapidly, and have developed a lot over the last few weeks."
"Between 18-22 weeks of pregnancy, your provider will perform a more detailed ultrasound, called an anatomy scan. This type of ultrasound will help your doctor check the development of your babies, screen for any anomalies or problems, and determine (or confirm) the sexes of your babies."
"Your twins are becoming more developed to be ready for life outside of the womb. At 24 weeks, they are considered viable and could possibly survive outside of the womb - in an intensive care unit, with a lot of help."
"At 28 weeks pregnant with twins, you are in the third and final trimester of pregnancy! You may be feeling uncomfortable and possibly have some new symptoms as your belly grows with your growing babies. Twin development this week is very important as you head into the final trimester of pregnancy."
"At 32 weeks, your twin babies have sleep and wake cycles, have shed the lanugo off their bodies, have hair on their heads, bones that will soon be hardening, and other new and important developments."
"You’ve made it to (almost) the end of your twin pregnancy! At 36 weeks pregnant, you’re probably preparing for birth and getting the nursery ready to bring home your little ones. You may have signs of labor soon, and there are some symptoms you shouldn't ignore. Here's what you need to know about what's going on at 36 weeks pregnant."