How to Make a Baby- Fetal Dev and Reproduction Flashcards
Graafian vs primary follicle
primary = thousands of follicles you are born with graafian = mature follicle
where does fertilization take place?
distal third of the fallopian tube
where and when does implantation occur?
uterus
6-10 days following conception
upper portion of uterus =
fundus
The narrow, lower end that opens to the vagina is the=
cervix
inner lining of uterus=
endometrium
2 lays of endometrium =
basal = permanent regenerative = functional
Estrogen and progesterone stimulate ______layer to thicken for implantation
regernative/functional
if no implantation occurs in the endometrium the _____ layer sheds during menstrual cycle
rengerative/functional
How many days can sperms survive in female reproductive tract?
2-3 days
3 phases of menstrual cycle
- follicular
- ovulatory
- luteal
menstrual vs endometrial cycle
Menstrual Cycle Ovarian Cycle (3 phases) =Maturing of the ova
Endometrial Cycle (3 phases)= Changes in the endometrium of the uterus
3 phases of endometrial cycle
- proliferative
- secretory
- menstrual
follicular, ovulatory, or luteal phase:
• LH, FSH, graafian follicle produces estrogen
follicular
follicular, ovulatory, or luteal phase:
- peak estrogen and LH levels
- ends with release of mature egg
ovulatory
ovulation =
release of mature egg
what happen in luteal phase of menstrual cycle?
Corpus luteum produces high levels of progesterone and low levels of estrogen if pregnancy occurs
◦ if no preg then corpus luteum will degenerate, low levels progesterone and menstruation occurs
◦ empty follicle forms into corpus luteum
What happens in proliferative phase of endometrial cycle? when does it occur? what is primary hormone?
• Estrogen made by graafian follicle– primary hormone
◦ Takes place after menstruation and ends with ovulation
◦ endometrium is thickening and vascularizing to prepare for implantation
what happens in secretory phase of endometrial cycle? primary hormone? when does it occur?
• Progesterone secreted from corpus luteum – primary hormone
◦ starts after ovulation and ends with onset of menstruation
◦ endometrium continues to thicken
◦ if preg occurs it will develop and secrete glycogen ◦ if no preg luteum degrades
what happens in menstrual phase of endometrial cycle? hormones?
• Significant decrease in progesterone and estrogen
◦ occurs in response to hormone changes
◦ sloughing off of regenerative layer
What does FSH primarily act to stimulate?
• Development of the uterine endometrium
• Release of the mature ovum
• Maturation of the ovarian follicle
• Development of the ovary
ANSWER: • Maturation of the ovarian follicle
RATIONALES:
• Development of the uterine endometrium = stimulated by estrogen from ovarian follicular cell
• Release of the mature ovum = after a spike in LH
• Development of the ovary = occurs during fetal development
3 phases of fetal development?
- conception
- cell division
- implantation
what happens during fertilization (conception)? where does it happen?
- Conception (fertilization)
• Sperm enters oocyte – zygote – 46 chromosomes
• Outer third of fallopian tube
What happens during cell division face of fetal development?
- Cell division
• Blastocyst
• Embryoblast
• Trophoblast
