Pregnancy Information Center

Information, Symptoms, Treatments and Resources


Your First Trimester - Week 2


Week 2

What's Happening To Your Body

You're not officially pregnant yet, but you're close! By the end of this week, your egg will be fertilized. Although your baby's gender will be determined at the moment of fertilization, you will not be able to find out whether you’re having a boy or a girl through ultrasound until week 18 at the earliest.

Your uterine lining thickens to prepare for implantation. During this development, the glands and blood vessels in the endometrium are increasing in size and number. 

Your body is also providing stimulation for the egg to grow by releasing hormones that will lead to the release of a mature egg through the wall of the ovary and into the fallopian tube where it will wait to be fertilized. This process is known as ovulation.

What's Happening To Your Baby

The gender of your baby is determined upon conception, when the sperm fertilizes the egg. Two of the 46 chromosomes that make up your baby’s genetic material determine whether it is a boy or a girl.

One chromosome from you and one from your partner will determine your baby’s gender. While a woman only donates X sex chromosomes, the man can donate an X or a Y. His contribution determines the gender of the baby — if he donates an X (giving the egg “XX”), your child will be a girl; a Y (giving the egg “XY”), it will be a boy.


Read This Next: Week 3

In Case You Missed It: Week 1

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