Gynecology Flashcards
(148 cards)
Established by genetic inheritance at the moment of fertilization
Chromosomal sex
Development of primary sex organs in response to genetic sex
Gonadal sex
Regulation by gonadal sex of the differentiation of the genital apparatus
Phenotypic sex
Establishment of gender role, gender identity, or sexual orientation
Psychological sex
Plano-convex mass adherent to the inner side of the nuclear membrane in somatic cells of genetic females
Barr body
Inactivation of one of the two copies of X chromosomes in females
Lyonization
Possible specimens for sex chromatin test
buccal smear, nerve cells, blood smear, vaginal smear
Present only in 15/100 of male cells and invariably absent in females; basis for the test used in screening for large populations in sports competitions
Fluorescent body/ Y body (Hair-root test)
Gold-standard for sex determination; required for patients undergoing gender-reassignment
Karyotyping
Composed of coelomic epithelial cells; develops into the female ovaries
Outer cortex of the primitive gonads
Composed of stromal mesenchyme surrounding cords of epithelial cells; develops into the male testess
Inner medulla of the primitive gonads
AOG when primitive gonads are present
4th-6th week
AOG when testes normally descend through inguinal ring
7-9 months
Testosterone secreted by Leydig cels induces differentiation of anlagen of external genitalia. What mechanism?
Classic Endocrine Mechanism
Action of MIF on Mullerian duct; action of Testosterone on Wollfian duct. What mechanism?
Local Paracrine Regulatory Mechanism
Portion of Y chromosome that determines genetic sex
SRY gene
Which structures arise from the Wolffian ducts?
Vas deferens, epididymis, seminal vesicles
Which structures arise from the Mullerian ducts?
Uterus, fallopian tube, cervix, upper vagina
Converts testosterone to dihydrotestosterone
5-alpha-reductase
Responsible for differentiation of Wollfian ducts to male internal genitalia at 9 to 10 weeks AOG; secreted by Leydig cells
Testosterone
Glycoprotein hormone secreted by Sertoli cells; induces dissolution of Mullerian ducts, inhibiting differentiation of female internal genitalia
Mullerian Inhibiting Factor / Anti-Mullerian Hormone
Common embryonic origin of male and female external genitalia
Anlagen
Embryonic origin of glans penis, corpus cavernosum, corpus spongiosum
Genital tubercle
Embryonic origin of clitoris and vestibular bulb
Genital tubercle