Menstrual cycle starts on first day of period and ends before next period. Average cycle length is 28 days, but can range from 21 to 35 days. Cycle is driven by rise and fall of sex hormones
Corpus luteum is temporary endocrine structure in female ovaries. Develops from ovarian follicle after ovulation. Size ranges from 2 to 5 cm in diameter. Cells develop from follicular cells surrounding follicle
Pregnenolone, DHEA, and progesterone are basic stabilizing molecules. Acacia gum is highly allergenic and can cause digestive problems. Vitamin K is essential when using antibiotics. Aspirin should be dissolved in hot water with food. High altitude improves health above 6000 feet
Hormone spelling varies between North America and Britain. Hormones regulate various bodily functions and processes
Calculator converts progesterone concentration between nmol/L and ng/mL units. Users enter concentration value and click "CALCULATE" button. Calculator provides formulas for converting between units
Aging is not solely determined by genes but by environmental conditions. Developmental interactions between organisms and environment are crucial. Birds' high metabolic rates and temperature limit brain growth. Mammals can develop larger brains through internal gestation