What are the stages of pregnancy and fetal development?

Pregnancy is a complex process that involves several stages of fetal development. The stages of pregnancy are typically divided into three trimesters, each lasting approximately 12-14 weeks. During these trimesters, the fetus undergoes significant growth and development.

First Trimester

The first trimester begins with the first day of the woman's last menstrual period and lasts until the end of week 12. During this time, the fertilized egg implants in the lining of the uterus and begins to develop into a fetus. At around week 6, the fetal heartbeat can usually be detected through ultrasound.

Second Trimester

The second trimester lasts from weeks 13 to 27. During this time, the fetus grows rapidly and begins to develop distinct facial features, limbs, and organs. Around week 16, the sex of the fetus can usually be determined through ultrasound.

Third Trimester

The third trimester begins at week 28 and lasts until birth. During this time, the fetus continues to grow and develop, and begins to prepare for birth. By week 32, the fetus typically weighs around 4 pounds and can open and close its eyes. By week 37, the fetus is considered full-term and is ready for delivery.

It's important to note that every pregnancy is different, and not all fetuses develop at the same rate. Additionally, some women may experience complications or give birth prematurely. If you have any concerns about your pregnancy or fetal development, it's important to speak with your healthcare provider.