[Low molecular heparin in a pregnant women with heart valve prosthesis].

Women with a prosthetic heart valve who wish to bear a child face a difficult choice. Continued medication with warfarin during pregnancy will offer her a reasonable good protection against thrombosis, but carries a considerable risk of teratogenic effects. Subcutaneously administered heparin is an alternative to warfarin.

Cell division in placentas of appropriate and small-for-gestational-age infants. A flow cytometry study.

Background: The purpose of this study was to examine if placentas of small- for-gestational-age (SGA) and non-SGA infants differ with respect to proliferative cell activity.

Method: Cell cycle distribution was studied in placentas from 181 SGA (birthweight < 10th percentile) and 528 non-SGA births by flow cytometry measurements of relative DNA content.

Results: The fraction of cells in various cell cycle phases (G1-, S- and G2-phases) did not differ with gestational age from 30 to 43 weeks in either of the groups.

Changes in frequency and indications for cesarean section in Norway 1967-1984.

We have studied the cesarean section frequencies and changing spectrum of indications in Norway during six consecutive 3-year periods from 1967 to 1984. The data set consists of 1,046,162 births notified to the Medical birth registry of Norway, of which 52,426 were specified as cesarean sections, the frequency rising from 1.9% in 1967-69 to 9.