Your baby this week
16 weeks pregnant

"O" is for Oocyte

Maternity wear

Oocyte is an odd-looking word for something you know more commonly as an egg or ovum. This reproductive cell represents a mother's contribution of DNA to her baby. Unlike sperm, eggs are not replaceable. We are born with millions of eggs -- the most eggs we'll ever have (and thankfully more than we'll ever need).

Here's an unusual and cool bit of trivia: When your mother was pregnant with you, you already carried the egg(s) destined to be her grandbabies. In this small way, all women who are pregnant with daughters carry one part of their potential grandchildren within them.

Know your amnio

Amniocentesis, also known as an “amnio,” is a prenatal test commonly used to check for chromosomal defects, although certain other tests can also be performed on the sample. When testing for fetal abnormalities, this procedure is usually done between 16 and 18 weeks of pregnancy (which is between 14 and 16 weeks after conception). Check out this quick guide to amnio for moms!

Save your hair

Even though pregnancy hormones may have you feeling warmer than usual, don’t be tempted to leave your hat at home when heading out into the cold. Doing so can wreak havoc on your hair, according to Jennifer Bahney of

Wear a hat

How can the cold really be a problem? It's because the moisture content of your hair shrinks violently when exposed to freezing temperatures, then immediately expands when you’re back indoors. This cycle can actually cause the moisture in your hair to explode, much like the water in a plant that’s damaged during a frost. These mini-explosions seriously weaken hair and leave it prone to breaking and splitting.

Helping your hair stay as close as possible to a moderate temperature during the winter months is one of the best things you can do to keep it in good condition. To protect your hair from the extreme cold, wear it under a hat, thick scarf or even tuck it into your coat. This will keep your hair closer to body temperature so that it won’t rapidly expand once you’re inside.

Woah baby

The successful birth of healthy twins at Jerusalem's Hadassah University Medical Center from 12-year-old frozen embryos has given scientists and doctors a better insight into the efficacy of cryopreservation and the viability of the embryos once they are transferred to a woman's womb. This is believed to be the longest reported successful frozen human embryo transfer. Read the rest of this amazing story right here!

In the know

During an ultrasound examination, the baby's heart chambers and lobes of the brain are visualized and counted. The spine will also be visible, and is often described as a "string of pearls" -- see an example below. The sonogram (ultrasound exam) takes anywhere from 15 to 30 minutes.


Photo galleries