Module 3 Flashcards
Menarch
The first menstrual cycle
- Age 8-15
Anterior Pituitary
Target organ is the ovaries
- Hormones
Anterior Pituitary Hormones
Target organ is the ovaries
- Hormones
->FSH
->LH
Ovarian Hormones
Estrogen & Progesterone
Uterine Cycle
Menstrual Cycle (Phase)
- Lasts 3-6 days, begins on first day of flow
-> Lining is shed
Proliferative Phase
- Lasts from end of menstruation until ovulation
-> 28 day cycle, about day 14
Ovulation
- Egg is released from ovary, travels through Fallopian tube in hopes of fertilization
Secretory Phase
- Endometrial cells swell and prepare for fertilized ovum
-If no fertilization, levels drop & period begins
Ischemic Phase
Ovarian Cycle
Folicular Phase
- Stimulated follicle growth
Ovulation
Luteal Phase
- Ovum is related from folic until menses begins, folic becomes corpus lutem
Conception
Union of sperm and ovum (egg)
- Sperm can survive 48-72 hours
- Ova is fertile for 12-24 hours
Fertilization
Sperm penetrates ovum
- Critical time phase
-> about 72 hours, 12-24 hours after ovulation
-> about 24-48 hours before ovulation
Pre-Embryonic Period
Rapid cell division
- As zygote migrates towards uterus
6-10 days after fertilization is implantation
- Uterus is in secretory phase
Only about 50% of zygotes actually achieve implantation
Function of the placenta
Transports and Exchanges
- Serves as the liver, kidneys, lungs, GI tract for fetus as well as passive immunity via maternal antibodies for fetus until fetal systems are mature enough to function
Hormones:
- hCG
- Estrogen
-Progesterone
-hPL
First Trimester
From conception to end of week 12
Can tell sex of baby
Heart begins to beat
Spontaneous movement
Second Trimester
From week 13- week 26
Very active
Lungs begin forming alveoli/surfactant
Eyes open, sensitive to light/sounds
Third Trimester
From week 27 to birth
Subcutaneous fat increases (look “chubby”)
Bones still soft/flexible
Respiratory & Circulatory systems function
Maternal antibodies are transferred to fetus
Estrogen
Secreted in the ovaries then the placenta
- Major Actions:
- Increase uterine growth
- Increase support of breast development
- Increase uterine blood flow
Progesterone
Secreted in the corpus lutem early on then placenta
- Major Actions:
- Relaxes smooth muscle: which reduces gastric motility and relaxes blood vessel walls