Your Baby's Development
At about 5.1 inches (13 cm) from crown to rump and
weighing 4.9 ounces (140 grams), your baby is still very tiny.
The placenta, which nourishes the fetus with nutrients and oxygen
and removes wastes, is growing to accommodate your baby. It now contains thousands
of blood vessels that bring nutrients and oxygen from your body to your baby's developing
You may notice that your breasts have changed considerably
since your pregnancy began. Hormones are preparing your breasts for milk production
— more blood is flowing to the breasts, and the glands that produce milk are
growing in preparation for breastfeeding. This can increase your breast size (many
women increase one to two cup sizes) and make veins become visible. Buy supportive
bras in a few different sizes to manage your breast growth during pregnancy.
PREGNANCY CALENDAR: A week-by-week
- Trimester 1
- Trimester 2
- Trimester 3