Basic Knowledge on Genetics and Obstetrics
- DNA – carries genetic code
- Chromosomes – threadlike strands composed of hereditary material – DNA
- Normal amount of ejaculated sperm 3 – 5 cc., 1 tsp
- Ovum is capable of being fertilized with in 24 – 36 hrs after ovulation
- Sperm is viable within 48 – 72 hrs, 2-3 days
- Reproductive cells divides by the process of meiosis (haploid)
Spermatogenesis – maturation of sperm
Oogenesis – process - maturation of ovum
Gematogenesis – formation of 2 haploid into diploid 23 + 23 = 46 or diploid
- Age of Reproductivity – 15 – 44yo
- Menstruation-
Menstrual Cycle – beginning of mens to beginning of next mens
Average Menstrual Cycle – 28 days
Average Menstrual Period - 3 – 5 days
Normal Blood loss – 50cc or ¼ cup
Related terminologies:
Menarche – 1st mens
Dysmenorrhea – painful mens
Metrorrhagia – bleeding between mens
Menorhagia – excessive during mens
Amenorrhea – absence of mens
Menopause – cessation of mens/ average : 51 years old
- Functions of Estrogen and Progestin
* Estrogen “Hormone of the Woman” –
Primary function: development secondary sexual characteristic female.
Others:
1. inhibit production of FSH ( maturation of ovum)
2. hypertrophy of myometrium
3. Spinnbarkeit & Ferning ( billings method/ cervical)
4. development ductile structure of breast
5. increase osteoblast activities of long bones
6. increase in height in female
7. causes early closure of epiphysis of long bones
8. causes sodium retention
9. increase sexual desire
*Progestin “ Hormone of the Mother”
Primary function: prepares endometrium for implantation of fertilized ovum making it thick & tortous (twisted)
Secondary Function: uterine contractility (favors pregnancy)
Others: 1.inhibit prod of LH (hormone for ovulation)
2.inhibit motility of GIT
3. mammary gland development
4. increase permeability of kidney to lactose & dextrose causing (+) sugar
5. causes mood swings in moms
6. increase BBT
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