Twinning Frequencies in Baden-Wurttemberg According to Maternal Age and Parity from 1955 to 1972

Secular changes in dizygotic twinning rates

1972 • 73 citations

Changes in the twinning rate in Canada 1926-70.

1973 • 46 citations

Ease of conception in mothers of twins

1971 • 39 citations

[Secondary amenorrhea following ovulation inhibitors].

1974 • 3 citations