Exam 3: Conception,prenatal Development,and Birth

You are examining a child who is short and stocky,with a small head,round face,slanted eyes,and a flat nose.She is cheerful and affectionate,but seems to have muscle weakness and difficulty learning.You should suspect that she may have

Neurogenesis is nearly complete in the fetal brain after approximately _____ weeks.

Mara and Laurence have been unable to conceive a child after trying for over a year.One option for solving this problem is for the doctor to inject some of Laurence's sperm directly into Mara's uterus.This procedure is called

Because they have been unable to conceive a child for over a year,Tammy and L.J.have decided to try in vitro fertilization.This means that

Physicians will generally perform a caesarian section under any of the following conditions,except

_____ occurs when an embryo has only one X chromosome but no Y chromosome.

A pregnant woman who is HIV-positive

_____ is a condition in which part of a fetus's brain does not develop.

Doctors measure a newborn's motor capabilities,alertness,and responsiveness shortly after birth using the

All of an embryo's major organs and body parts have formed by about _____ after conception.

A baby is considered low birth weight if it weighs less than _____ pounds.

A fetus is likely to yawn,curl its toes,and blink approximately _____ weeks after conception.

Because premature babies do not produce enough surfactin,they may suffer from

A baby born in the 39^th week of a pregnancy is considered

You are a doctor investigating birth defects.One of your patients has anencelapathy.It's likely that her mother

Ling has just felt her fetus kick for the first time.This means it is about _____ weeks after conception.

The effects of teratogens on an unborn child are

Cocaine use by pregnant women may lead to _____ in their babies.

Smoking

The fetus begins moving spontaneously in about the fourth month of pregnancy.This is called