1. CONCEPTION and PREGNANCY
Females ovary eggs
Males testes sperm
Oogenesis female sex cell division
Spermatogenesis male sex cell division
Female = XX Male = XY

2. CONCEPTION and PREGNANCY
FERTILIZATION
During sexual intercourse (coitus)
sperm enter female reproductive tract and live a day or two
Eventually, one sperm penetrates and fertilizes the ovum

3. CONCEPTION and PREGNANCY
Approximately 100 million sperm in 1 cc of semen
Many sperm die before they reach the ovum
1. acidity of the vagina
2. higher temperature in the abd. of the women
3. lack of mobility

4. CONCEPTION and PREGNANCY
INFERTILITY
When conception does not occur – caused by damage to fallopian tubes, low sperm count, hormone imbalance, other disorders
If sperm count is less than 20 million sperm per 1cc of semen, a man is considered sterile

5. CONCEPTION and PREGNANCY
Zygote continues to divide as it travels down fallopian tube and is implanted in wall of uterus.
At 7 days, the zygote becomes an embryo
At 3 months, it becomes a fetus

6. CONCEPTION and PREGNANCY
Implantation of Embryo
Occurs about 6 days after ovulation and takes about a week to complete
Coincides with Corpus Luteum stage and is completed about the time the Menstruation Stage is to begin
First sign of pregnancy is a missed period

7. CONCEPTION and PREGNANCY
Due to implantation, the uterine lining produces “HCG”
THIS HORMONE IS ONLY PRODUCED IN PREGNANCY!!
Function: causes corpus luteum to continue to produce progesterone

8. CONCEPTION and PREGNANCY
HCG is detectable in blood about the time the period is due
Not detectable in urine until approximately 2 weeks after a missed period

9. CONCEPTION and PREGNANCY
Pregnancy prenatal period
gestation
Normal pregnancy = 40 weeks or
3 trimesters (3 months each)
Quickening first recognizable movement of fetus, 4th-5th month
Miscarriage spontaneous loss of the pregnancy

10. CONCEPTION and PREGNANCY