Chapter 40 - Chapter 40 Obstetrics Obstetrics the branch of...

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Chapter 40: Obstetrics Obstetrics - the branch of medicine that deals w/the care of women throughout pregnancy. Prenatal period (pre-birth period)- is the time from conception until delivery of the fetus. Ovulation - the release of an egg from the ovary Placenta - the organ that serves as a lifeline fro the developing fetus. Afterbirth - the placenta and accompanying membranes that are expelled from the uterus after the birth of a child. Umbilical cord - attaches the placenta to the fetus. o 2 umbilical arteries - return relatively deoxygenated blood to the placenta. o 1 umbilical vein - transports oxygenated blood to the fetus Amniotic sac - the membranes that surround and protect the developing fetus throughout the period of intrauterine development. Amniotic fluid - clear, watery fluid that surrounds and protects the developing fetus. Physiologic Changes of Pregnancy o Reproductive system - Estrogen causes the vaginal mucosa to thicken, vaginal secretions to increase,, and the connective tissue to loosen to allow for delivery. The breasts enlarge and prepare for lactation By end of pregnancy reproductive system weighs 2lbs/1000g and has a capacity of 5000ml and contains about 16% of total blood volume. o Respiratory system 20% increase in O2 demand 40% increase in tidal volume o Cardiovascular system 45% increase in maternal blood volume, which can cause anemia. To combat the anemia pregnant women take Iron supplements. HR increase of 10-15bpm. B/P initially drops but returns to normal late in pregnancy. Cardiac output increases and peaks @ 6-7L/min o Gastrointestinal system n/v caused by hormones o Urinary system - increase urination o Musculoskeletal system - pelvic joints loosen due to hormones Fetal Development Estimated date of confinement (EDC
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This note was uploaded on 10/13/2011 for the course PARAMEDIC 101 taught by Professor Bator during the Spring '11 term at Columbus State Community College.

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Chapter 40 - Chapter 40 Obstetrics Obstetrics the branch of...

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