GYN Flashcards
Perineum
- Tissue between vaginal opening and anus
- Stretches out during childbirth and may tear
-Obstetrician may perform an episiotomy
•Places an incision in this tissue that is easier to repair and heals better than the torn tissue
Vagina
Lower portion of the birth canal
Uterus
- Pear shaped organ
* Made up of the lower, narrow (neck) or cervix the middle or body, and the uppermost, dome-shaped fundus
Endometrium
- Inner lining of the uterus
* Nutrient-rich area of implantation of fertilized egg
Myometrium
- Muscular, middle lining of uterus
- Responsible for contractions
- Thickest at fundus
Fallopian Tubes
- 2 tubes connected to the uterus
- One on either side
- Lined with cilia
Ovaries
- A pair of glands located on either side of the uterus
- Release nature egg or ovum (plural; ova)
- Release reproductive hormones- estrogen & progesterone
- Ovaries ➡️
- NOT connected to Fallopian tubes
- Generally, one ovary produces an ovum on altering months
- Baby girls are born with all of the ocytes she will ever possess
Menstruation cylcle
- Approximately 29 days
- Begins with menstruation
- Blood, mucus, cellular debris is shed from the endometrium
- Normal flow averages 25-60 mL, and lasts 4-6 days
Menarche
- Onset of first menses
- Signals the beginning of childbearing age
- Around 11-14 years of age
- Average 12.5 years of age
Menopause
•End of childbearing years
•As long as a woman continues a menstrual cycle, she is capable of conceiving a child
-Average 51-52 years of age
Ovulation
- Release of mature ovum from ovary
* Occurs by release of luteinizing hormone (LH) from anterior pituitary gland
Progesterone
- The hormone of pregnancy
- Prepares uterus for implantation
- Regulation of menstrual cycle
Estrogen
•Females
- Prepares endometrium for implantation
- Secondary sex characteristics
•Males
- Mature sperm
- Increased libido
Fertilization
Takes place in the distal third of the fallopian tube
24hr window for fertilization to take place
1 sperm + 1 ovum
Implantation
•Fertilized ovum travels to the uterus
-Endometrium has grown thicker in preparation for pregnancy
•Cervix sealed with a mucus plug
•Implantation on the uterine wall takes place 1 week
•Placenta begins to form
•Embryo until the 8th week of pregnancy ➡️ then fetus
•If fertilization does not take place:
-Menstruation always occurs 14 days after ovulation
•Menstrual cycle begins again