51.4 Pregnancy and Birth in Mammals

Carbon genes

________ are only expressed during certain stages of embryonic dioxide and other waste products from the fetus are carried through development.

Estradiol

________ enters the maternal circulation when certain globin mones from the fetus are stimulated.

Female mammals

________ eat the placenta after it passes out of the uterus.

Prostaglandins

What are produced by the uterus? Answer with a single words or term.

lower P

A(n) ________ indicates a higher affinity of hemoglobin for oxygen.

Hor

________ tend to have specialized functions at the end of pregnancies.

sensory nerves

What are stimulated by the hypothalamus? Answer with a single words or term.

positive feedback loop

A(n) ________ is formed when the uterus senses the more powerful contractions and signals the mother's pituitary to produce more oxytocin.

blood vessels

The mother's ________ are rich in ________ from the fetus.

direction of blood flow

The ________ is indicated by the black and white arrows.

Estradiol

________ increases uterine sensitivity to the hormone oxytocin.