![]() ![]() Fraternal twins are more common than identical twins.Īt around 4 weeks pregnant, some important developments occur, including implantation. If you have two zygotes, from two eggs fertilized by different sperm, these twins will not be identical and can be either the same or different sex. ![]() Because they come from the same zygote, they will have the same chromosomes and be the same sex.įraternal twins. When you have one zygote that splits into two during early pregnancy and grows into separate embryos, you’ll have identical twins. When a sperm fertilizes an egg, it becomes a single cell called a zygote, which has 46 chromosomes that d etermine your baby’s sex and physical traits. And when it comes to a twin pregnancy, there’s quite a lot going on in that belly of yours, which is now nurturing either identical or fraternal twins. 3 WeeksĪfter the first three weeks of pregnancy, you may start to feel a few pregnancy symptoms. Read on to learn about twin pregnancy development and symptoms, week by week during the first trimester. During your first trimester, a home pregnancy test can confirm your hunch that you're pregnant, and eventually an ultrasound scan at your healthcare provider's office will reveal you are pregnant with twins.Īlthough the first few weeks are a little uneventful, the first few months are quite exciting! Both of your babies develop from a cluster of cells to a tiny fetus with a heart, spinal cord, head, and limbs. In the first few weeks of your twin pregnancy, you might notice some typical signs of early pregnancy, such as breast tenderness, fatigue, nausea, and a missed period. So, you’ve hit the jackpot-you’re pregnant with twins! While you’re adjusting to this life-changing news, your little ones are already growing and preparing to meet you! As you embark on this double adventure, it can be helpful to know about some of the common twin pregnancy symptoms that may await you week by week. ![]()
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