Lernmaterialien für Chapter 24- Reproductive an der Southern Alberta Institute of Technology

second stage of labor, head normally appears first (crowning) and once emerged, mucous is cleared from mouth and nose and umbilical cord is clamped and cut

first and longest stage of labor, longer in primipara (first time birth giver) than multipara (previously given birth). Cervical effacement is progressive thinning of cervical walls and cervical dilation is progressive widening of cervix to allow for passage of fetus

• high levels of estrogen though out pregnancy stimulate growth of ducts through out mammary glands
• high levels of progesterone stimulate development of acini at ends of ducts

1. acrosomes on the sperms head release enzymes to break down the cells and zona pellucida 
2. a path is formed and one sperm makes its way to the egg, this changes the egg so no other sperm can enter
3. Sperm's tail degenerates and releases its nucleus which fuses with the egg to produce a 46 chromosome zygote

transparent sac filled with fluid, that envelopes the embryo. Fluid protects the embryo and later the embryo will breathe and swallow the fluid.

outermost extraembryonic membrane, finger like projections penetrate the uterus. In the area of umbilical cords, chroion forms what will become the fetal side of the of the placenta

final stage and involving delivery of the after birth (placenta, amnion and fetal membranes), contraction help seal any blood vessels that may be bleeding

1. suckling neonate (baby) sends nerve impulses to anterior and posterior pituitary gland
2. anterior secretes prolactin causing milk production
3. the posterior secretes oxytocin which causes milk secretion

1. 16 days after conception, blastocyst becomes an embryo
2. germ layer differentiates and becomes organs and organ systems
3. accessory organs aid the developing embryo

fine hair that covers the body which is then covered by a white, cheese like substance called vernix caseosa, which protects the skin from amniotic fluid

a surgical incision sometimes made between vagina and anus to enlarge the vaginal opening during birth