CHAPTER 22: THE REPRODUCTIVE SYSTEMS
1.Definition = the time a zygote, embryo, and fetus is carried in the female reproductive tract;
2.Time period = 266 days from fertilization;
3.Obstetrics = the specialized branch of medicine that deals with pregnancy, labor, and the period immediately following birth.
B.Anatomical Changes of Uterus:
1.occupies most of pelvic cavity by end of month 3;
2.At full-term, occupies most of the abdominal cavity.
a.Liver, intestines and stomach are pushed upward;
c.widens thoracic cavity;
d.Ureters and urinary bladder are compressed.
a.weight gain (from fetus, amniotic fluid, placenta, uterus, and water);
b.increased storage of proteins, triglycerides, and minerals;
c.marked breast enlargement in prep of lactation;
d.lower back pain due to lordosis.
a.increase in SV & CO by 30%;
b.increase in HR by 10/15%;
c.increase in blood volume by 30/50%;
d.compression of IVC decreases venous blood return and results in edema in lower limbs.
a.TV & ERV increase 30/40%;
b.functional residual capacity may decrease to 25%;
c.Total oxygen consumption increases 10/20%.