title: Physical and chemical properties of fetal membranes: their relation to parity, maternal age, sex and weight of the newborn.
abstract: The relation between collagen content and bursting pressure of human fetal membranes is reported. There is a highly significant association between the two variables. No significant relationship was found between parity, maternal age, sex and body weight on  the one hand and the collagen content per unit surface area of fetal membranes on the other . However, the bursting pressure of fetal membranes seems to be lower among the age group of less than 25 yr compared to 25-29-yr-old mothers. Neither parity nor sex of the newborn seem to affect the bursting pressure of fetal membranes.
mesh_terms: D001724:Birth Weight; D003094:Collagen / Q000032:analysis; D005321:Extraembryonic Membranes / Q000032:analysis / Q000502:physiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D010298:Parity; D011247:Pregnancy; D011312:Pressure; D012737:Sex Factors
chemical_list: D003094:Collagen