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By the end of the eighth week of pregnancy — six weeks after conception — your baby might be about 1/2 inch (11 to 14 millimeters) long. Eight weeks into your pregnancy, or six weeks after conception, your baby's lower limb buds take on the shape of paddles. Fingers have begun to form.
Pregnancy. / Your Baby. Fetal development week by week. Medically reviewed by Layan Alrahmani, M.D., ob-gyn, MFM. Written by Kate Marple | Feb 21, 2023. Advertisement | page continues below. Curious about how your baby is developing in the womb? Here's a breakdown of fetal development week by week.
How Many Weeks Are in the First Trimester? The first trimester is defined as the first 12 weeks of pregnancy counting the first day of the person's last menstrual period (LMP) to the end of...
The first trimester begins at conception and lasts for 13 weeks, or three months. Month one spans from week one to week four of pregnancy; month two begins at week five and lasts until week eight; and the third and final month of the first trimester spans week nine through 13.
You'll likely have checkups every four weeks for about the first 28 weeks of pregnancy. You may need checkups more or less often. It depends on your health and medical history.
First trimester. The first few months of pregnancy — the first trimester — are marked by rapid changes. During the first trimester, physical changes may include breast tenderness, fatigue and nausea. Emotions might range from excitement to anxiety.
Each trimester is about 13 weeks or three months long. A full-term pregnancy lasts 40 weeks or between nine and 10 months. Your healthcare provider will talk to you about fetal development in terms of weeks. Your first trimester of pregnancy lasts until the 13th week of pregnancy. Advertisement.