[05] Fertilization and Pregnancy Flashcards
What is fertilization in terms of reproduction?
The union of a sperm and an egg to form a zygote
Where does fertilization usually occur?
In the fallopian tubes
What are the stages of prenatal development?
- Zygote
- Embryo
- Fetus
When does an embryo become a fetus?
At the end of the eighth week of gestation
What is gestation?
The period of time from conception to birth
What is the function of the placenta?
It provides oxygen and nutrients to the fetus and removes waste products
What hormone confirms pregnancy in a pregnancy test?
hCG
What is hCG?
Human Chorionic Gonadotropin
What changes occur in a woman’s body during pregnancy?
- Enlargement of the abdomen
- Breast enlargement and darkening of the nipples
- Frequent urination
How long does a typical human pregnancy last?
About 40 weeks
What is implantation in terms of pregnancy?
The attachment of the embryo to the wall of the uterus
What is the role of progesterone during pregnancy?
It maintains the lining of the uterus and prevents menstruation
How does the body prepare for childbirth?
- The cervix softens
- The uterus contracts
- Hormones stimulate the mammary glands
What is the first stage of childbirth?
Dilation of the cervix
What is the second stage of childbirth?
Delivery of the baby
