Sources Cited

Three daily servings of reduced-fat milk: an evidence-based recommendation?
David S. Ludwig, Walter C. Willett
JAMA Pediatr. 2013 Sep; 167(9): 788–789. doi: 10.1001/jamapediatrics.2013.2408

Development of an LC-MS/MS method to quantify sex hormones in bovine milk and influence of pregnancy in their levels.
P. Regal, A. Cepeda, C. Fente
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012; 29(5): 770–779. Published online 2012 Feb 14. doi: 10.1080/19440049.2011.653989

The sensitivity of the child to sex steroids: possible impact of exogenous estrogens.
Lise Aksglaede, Anders Juul, Henrik Leffers, Niels E. Skakkebaek, Anna-Maria Andersson
Hum Reprod Update. 2006 Jul-Aug; 12(4): 341–349. Published online 2006 May 3. doi: 10.1093/humupd/dml018

Mechanisms of twinning: VII. Effect of diet and heredity on the human twinning rate.
Gary Steinman
J Reprod Med. 2006 May; 51(5): 405–410.

Effects of twin gestation on maternal morbidity.
Brett C. Young, Blair J. Wylie
Semin Perinatol. 2012 Jun; 36(3): 162–168. doi: 10.1053/j.semperi.2012.02.007

Obstetric complications of twin pregnancies.
Anita Rao, Shanthi Sairam, Hassan Shehata
Best Pract Res Clin Obstet Gynaecol. 2004 Aug; 18(4): 557–576. doi: 10.1016/j.bpobgyn.2004.04.007