Repro Topic 3 - General Reproduction Flashcards
(141 cards)
What causes stillbirth?
- Maternal
- Haemorrhage, diabetes mellitus, hypertensive pregnancy disorders, uterine rupture, advanced age, heavy smoking
- Foetal/placental
- Intrauterine growth retardation (placental insufficiency), placental abruption, infection, chromosomal abnormalities, congenital abnormalities, placental/umbilical complications, foetal hydrops
- Miscellaneous
- Unknown (50%), environmental factors
Describe the cause and presentation of dihydrotestosterone
- Occurs in small population in Dominican Republic
- No 5 alpha reductase gene (needed in the conversion of testosterone to dihydrotestosterone)
- XY children appear female - have blind vaginal pouch, enlarged clitoris and internal testes
- At puberty - testosterone wave, secondary sex characteristics develop (penis etc.)
Describe the cause and presentation of Turner’s syndrome
- XO genotype
- Primordial germ cells degenerate after arrival at genital ridge
- Causes failure of gonadal development - infantile genitalia, mesonephric duct regression, large hands, webbed neck
Define early pregnancy loss/early miscarriage
Loss of pregnancy in the first 12 weeks
Describe hormone therapy for transwomen
- Oestradiol valerate 1-2mg daily or oesdradiol 50meg/day transdermal patch
- Increase to 4-6mg daily or 100-200meg patch
- Anti-androgens
Describe the formation of the male urethra
- Androgens from testes cause genital tubercle to elongate into phallus
- Pulls urethral folds forwards, form lateral walls of urethral groove, close over urethral plate to form penile urethra
- Terminal part of male urethra (external urethral meatus) from surface ectoderm
What are the consequences of Klinefelter’s syndrome?
- Leydig cells have low testosterone production, so low sperm production
- Causes infertility, gynaecomastia, impaired sexual maturation
What complications can arise from the treatment of cryptorchidism?
- Haematoma
- Pain
- Wound infection
- Testicular atrophy
- Recurrent cryptorchidism - infertility
What questions should be asked when taking the history of an infertile couple?
- Age
- Personal and family history, congenital abnormalities
- Male
- Occupation
- Previous children
- Injuries
- Female
- Previous births/termination/miscarriages and complications
- Smears
Define miscarriage/spontaneous abortion
Loss of pregnancy in first 24 weeks
How may disorder of sex development present in a newborn?
- Overt genital ambiguity
- Apparent female genitalia - enlarged clitoris, posterior labial fusion, inguinal/labial mass
- Apparent male genitalia - bilateral undescended testes, micropenis, hypospadias
- Family history of DSD
- Discordance between genital appearance and prenatal karyotype
What structures develop from the paramesonephric (Mullerian) duct? How?
- Form the uterine tubes, uterus, vaginal canal
- Develop lateral to the gonads and mesonephric duct
- Responds to oestrogen
- Funnel-shaped cranial ends open into peritoneal cavity = infundibulum of uterine tubes
- Migrate caudally, parallel to mesonephric ducts
- Approach each other at midline - cranial = uterine tubes, caudal = uterovaginal primordium
- Males - degenerate due to anti-Mullerian hormone produced by Sertoli cells
List the ways in which missed/incomplete miscarriages are managed?
- Expectant management
- Medical management e.g. misoprostol
- Surgical management
When is chromosomal/genetic sex determined?
At fertilisation - XX is female, XY is male
What are the effects of oestrogen on transwomen?
- Breast growth
- Softer skin
- Less facial/body hair
- Fat redistribution to hips
- More emotional
What is a missed miscarriage?
- Unrecognised intrauterine death of the embryo or foetus without loss of the pregnancy from the body
- 15% of clinically diagnosed pregnancies
- Women may have no self awareness due to lack of obvious symptoms - may still experience sickness, tender breasts, tiredness (typical of pregnancy)
Which structures contribute to the developing bladder?
Anterior urogenital sinus and the caudal parts of the mesonephric duct
When is sex determined?
- Genetic sex is determined at fertilisation
- Gonads differentiate into male or female at week 7
- Genital duct development
- Gonadal development
- External genitalia development
What preventative measures should be taken in those who have undergone gender reassignment?
- Smears - FTM if cervix still present
- Prostate cancer screening
- MTF less risk due to oestrogen and anti-androgen, screen as for non-trans males
- Breast cancer screening
- FTM still some breast tissue - self-examination, refer breast lumps as usual
- MTF - offer breast screening
- General health monitoring - blood pressure, LFTs, hormone levels etc.
What are transvaginal scans used for?
- Antral follicle count
- Normal = 6-8
- More - polycystic ovaries
- Less - older/infertility
List the features of testicular dysgenesis syndrome
- Hypospadias
- Micropenis
- Low semen quality
- Testicular cancer
- Cryptorchidism
What is the cause of hypospadias?
Usually no specific underlying cause - associated with testicular dysgenesis syndrome, gives higher risk of cryptorchidism/inguinal hernias etc.
What are the complications of ectopic pregnancy?
- Main risk = rupture of uterine tube
- Sharp, sudden and intense pain in abdomen
- Dizziness
- Nausea
- Pallor