title: Maternal fructose and/or salt intake and reproductive outcome in the rat: effects on growth, fertility, sex ratio, and birth order.
abstract: Maternal diet can significantly skew the secondary sex ratio away from the expected value of 0.5 (proportion males), but the details of how diet may do this are unclear. Here, we altered dietary levels of salt (4% salt in the feed) and/or fructose (10% in the drinking water) of pregnant rats to model potential effects that consumption of a "Western diet" might have on maternofetal growth, development, and sex ratio. We demonstrate that excess fructose consumption before and during pregnancy lead to a marked skew in the secondary sex ratio (proportion of males, 0.60; P < 0.006). The effect was not mediated by selective developmental arrest of female embryos or influenced by fetal position in the uterine horn or sex-specific effects on sperm motility, suggesting a direct effect of glycolyzable monosaccharide on the maternal ovary and/or ovulated oocyte. Furthermore, combined excess maternal consumption of salt and fructose-sweetened beverage significantly reduced fertility, reflected as a 50% reduction in preimplantation and term litter size. In addition, we also noted birth order effects in the rat, with sequential implantation sites tending to be occupied by the same sex.
authors.forename: Clint
authors.initials: C
authors.lastname: Gray
authors.forename: Sophie
authors.initials: S
authors.lastname: Long
authors.forename: Charlotte
authors.initials: C
authors.lastname: Green
authors.forename: Sheila M
authors.initials: SM
authors.lastname: Gardiner
authors.forename: Jim
authors.initials: J
authors.lastname: Craigon
authors.forename: David S
authors.initials: DS
authors.lastname: Gardner
mesh_terms: D000818:Animals; D001722:Birth Order; D004435:Eating / Q000502:physiology; D005260:Female; D005298:Fertility / Q000187:drug effects*; D005632:Fructose / Q000008:administration & dosage*; D048788:Growth and Development / Q000187:drug effects*; D008297:Male; D011247:Pregnancy; D011256:Pregnancy Outcome; D011297:Prenatal Exposure Delayed Effects / Q000139:chemically induced / Q000503:physiopathology; D039401:Prenatal Nutritional Physiological Phenomena; D051381:Rats; D017207:Rats, Sprague-Dawley; D012098:Reproduction / Q000187:drug effects*; D012744:Sex Ratio; D017673:Sodium Chloride, Dietary / Q000008:administration & dosage*
chemical_list: D017673:Sodium Chloride, Dietary; D005632:Fructose