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4. The effects of maternal age, parity, and sex of the twins on twin perinatal mortality. A population based study. Rydhström H. Acta Genet Med Gemellol (Roma); 1990 Feb; 39(3):401-8. PubMed ID: 2085078 [Abstract] [Full Text] [Related]
7. Does the use of oral contraception depress DZ twinning rates? Campbell D, Thompson B, Pritchard C, Samphier M. Acta Genet Med Gemellol (Roma); 1987 Feb; 36(3):409-15. PubMed ID: 3451649 [Abstract] [Full Text] [Related]
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15. Multiple pregnancy and fetal abnormalities in association with oral contraceptive usage. Macourt DC, Stewart P, Zaki M. Aust N Z J Obstet Gynaecol; 1982 Feb; 22(1):25-8. PubMed ID: 6954940 [Abstract] [Full Text] [Related]
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