Placentas of small-for-dates infants: a small controlled series from Mexico City, Mexico.
Thirty-five placentas of small-for-dates infants were compared with control placentas of normally grown infants. They were small by weight, area, and volume and tended to have a marginal cord insertion; marginal cord insertion was associated with a thick cord, and central insertion, with a thin cord. When the two groups were compared, the first showed increased fibrinoid deposits and atherosis, more severe fetal abnormalities, and abnormal nutrition in the mother, together with a high incidence of preeclampsia. In the mothers of both groups, peak diastolic blood pressure was lower than that in the control group; additional factors leading to a probable reduction in placental blood flow were different in the two groups.
D005260:Female; D005316:Fetal Distress / Q000473:pathology; D005317:Fetal Growth Retardation / Q000473:pathology; D006801:Humans; D006973:Hypertension / Q000473:pathology; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D008800:Mexico; D009747:Nutritional Physiological Phenomena; D010920:Placenta / Q000473:pathology*; D011225:Pre-Eclampsia / Q000473:pathology; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000473:pathology; D012189:Retrospective Studies; D014470:Umbilical Cord / Q000473:pathology