What is the first stage of the menstrual cycle (that lasts 4-7 days) known as? - Answers
-Menstrual Cycle
What is the second stage of the menstrual cycle (lasting 8-13 days) known as? -
Answers -Follicular Phase
What is the third stage of the menstrual cycle, occurring at day 14, known as? -
Answers -Ovulatory Phase
What is the final stage of the menstrual cycle known as? - Answers -Luteal Phase
What occurs during the follicular phase of the menstrual cycle? - Answers -FSH causes
follicle maturation in the ovary. Increased oestrogen causes the endometrium to thicken
and become a nourishing environment for a potential pregnancy.
Define Ovulation - Answers -A period of heightened hormones where a dominant follicle
releases an egg into a Fallopian tube.
Which hormone is responsible for ovulation? - Answers -LH (Luteinizing Hormone)
What happens during the luteal phase of the menstrual cycle? - Answers -Oestrogen
decreases, progesterone increases due to the corpus luteum.
What happens during the menstrual phase of the menstrual cycle? - Answers -
Oestrogen and progesterone decrease and the endometrial lining is shed.
How long is an egg viable for following ovulation? - Answers -1 day
What happens if an egg is not fertilised? - Answers -Progesterone decreases, corpus
luteum is reabsorbed and FSH causes new follicles to start maturing.
Define capacitation - Answers -The protective covering of the acrosome of the sperm is
removed.
What sort of reaction begins when a sperm comes into contact with an egg? - Answers -
Cortical reaction - cortical granules block any other sperm from entering the egg
, How many chromosomes does a zygote contain? - Answers -46, in 23 homologous
pairs
How many cells does the merula have? - Answers -8 to 16
How many cells does the blastocyst have? - Answers -16 to 32
How many days after ovulation can implantation occur? - Answers -6 to 10 days
Define decidualisation - Answers -Progesterone increases, creating a hospitable
environment for the developing fetus.
What are trophoblasts? - Answers -Cells on the outer layer of the blastocyst
What are integrins? - Answers -Cell adhesion molecules that work in implantation.
What is the chorion? - Answers -Fetal part of placenta made out of trophoblast cells
Which hormone causes skin pigmentation in pregnancy? - Answers -Pituitary melanin-
stimulating hormone
What is the linea nigra? - Answers -Abdominal midline
What is striae gravidarum? - Answers -Stretch marks
What is choloasma? - Answers -'Mask of pregnancy' which is a tan or dark skin
discoloration.
What hormones cause SPD? - Answers -Increased relaxin and progesterone
What causes backache in pregnancy? - Answers -Increased progesterone and relaxin
that relaxes the sacroiliac joint.
How does the vagina change in pregnancy? - Answers -Increased vascularity resulting
in purple/red discoloration
What is Jacquemier's sign of pregnancy? - Answers -Vagina and cervix may appear
purple/blue due to increased blood supply
What is Osiander's sign of pregnancy? - Answers -Pulse located in the lateral vaginal
fornix which indicates pregnancy
What is the function of the cervical mucus plug? - Answers -Protect the fetus from any
ascending infections
What is an ectropion? - Answers -Purple/red discoloration of the cervix
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