[Size and number of adipocytes in the perirenal fatty tissue in pregnancy and in the postpartum period in rats].

As shown by the morphometric method of Sjöström et al., changes in the weight of pararenal adipose tissue during pregnancy in rats were connected with the changes in the size and not in the count of adipocytes. The character of adipose tissue changes occurring after birth depended mainly on the mode of the ratlings feeding. In case of normal feeding the ratlings hypoplasia of the adipose tissue took place in their mothers 7 to 14 days after birth; on the contrary, when the ratlings were isolated from their mother the weight of pararenal adipose tissue in the mothers rose as a result of the increase of the adypocytes number.