16 Weeks Pregnant – Pregnancy Week by Week
Do you bleed from your nose? The reason for this happening is that blood volume in pregnant women increases by 40 – 50%, which affects the level of estrogen hormone. Its effect is to swell mucous membrane of the nose; so, rhinitis or epistaxis are the conditions not to worry about. The increase in blood circulation volume affects the heart, too, which might lead to tachycardia. Don’t panic, but be sure to contact your gynecologist who will find the best solution for you. The round ligaments that support the uterus are still elongated, and you can continue to feel pain in the lower part of the stomach.
Believe it or not, your child is now blinking! Its lungs begin to develop: the period from this week to the middle of the fifth month is the most crucial time for this organ’s development. The baby’s legs are now longer than their hands, and as they often move them free, in the plenty of amniotic fluid you still might not be able to feel it. Baby’s heart is now pumping about 25 quarts of blood each day, and this amount will continue to increase as your baby develops.
At the doctor’s
If you are planning to obtain the amniocentesis, schedule it for a period from the 16th to 18th weeks of pregnancy. This procedure samples a small amount of amniotic fluid from the amniotic sac and examines it for genetic abnormalities. It is also possible to determine a gender by this analysis.
On the ultrasound examination between 12th and 14th weeks of pregnancy, the doctor measures the thickness of the skin folded behind the baby’s neck, nuchal translucency, to screen chromosome disorders (Down’s syndrome and other trisomies). If you skipped it, now is the time to do the biochemical screening.
The biochemical screening is obtained by measuring three or four marker proteins: alpha-fetoprotein (AFP), free estriol (uE3) and beta HCG, and, if possible, the inhibitor A. The results can show the presence of chromosomal disorders in baby’s karyotype.
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