USEFUL DEVELOPMENTAL DATA RELATED TO GENITOURINARY SYSTEM
- Urine is first produced by the kidneys during the 9th week of embryonic life .
- Fetal urinary bladder lies between the umblical arteries within the fetal pelvis.
- During the 2nd and 3rd trimester ,the urinary bladder empty and refill every 25-30 minutes.
- The fetal kidney can be demonstrated at approx. 11weeks transvaginally and at 12 weeks on transabdominal scan.
- The CMD should always be demonstrated in fetus older than 18weeks
- As a simple rule ,renal growth is 1.1mm/gestational week.
- After 14 weeks two-thirds of normal amniotic fluid is produced by fetal urination and one third from pulmonary fluid.
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