A gerbil dam's fetal intrauterine position affects the sex ratios of litters she gestates
Abstract
The vaginally delivered litters of gerbil dams that, in utero, occupied intrauterine positions between two males fetuses (2M females) contain a greater proportion of sons than do the vaginally delivered litters of gerbil dams that were gestated between two female fetuses (2F females). This difference in the sex ratios of litters delivered vaginally by 2M and 2F gerbils might reflect sex-biased differences in perinatal mortality in the litters of 2M and 2F dams. However, the results of the present experiment, in which gerbil litters were delivered by caesarian section from females that developed in 2M and 2F intrauterine positions, demonstrated unequivocally that 2M female gerbils gestate male-biased litters, whereas 2F female gerbils gestate female-biased litters.
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In both gerbils and mice, intrauterine position of females has significant influence on subsequent litter sex ratios.
“Interestingly, in both gerbils and mice, the intrauterine position of females has signifi- cant influence on their subsequent litter sex ratios.”
From Androgens and environmental antiandrogens affect reproductive development and play behavior in the Sprague-Dawley rat. (2002) · cites this paper as Clark and Galef 1995
Females that develop in utero between two males produce more males in their litters than do females gestated between two females.
“Females that develop in utero between two males produce more males in their litters than do females gestated between two females (Clark and Galef 1995; Vandenbergh and Huggett 1994).”
From Androgens and environmental antiandrogens affect reproductive development and play behavior in the Sprague-Dawley rat. (2002) · cites this paper as Clark and Galef 1995
Cites
Vom Saal, F. S., & Bronson, F. H. (1978) · Biology of Reproduction · doi:10.1095/biolreprod19.4.842 · Cited by 236 · see citing works
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Hotchkiss, A. K., Ostby, J. S., Vandenburgh, J. G., & Gray, L. E. (2002) · Environmental Health Perspectives · doi:10.1289/ehp.02110s3435 · Cited by 82 · see citing works
vom Saal, F. S. (2016) · Journal of Animal Science · doi:10.2527/jas.2015-0211 · Cited by 38 · see citing works
- Authors
- Clark, M. M., & Galef, B. G.
- Affiliations
- McMaster University (CA)
- Corresponding author
- Clark, Mertice M.
- Venue
- Physiology & Behavior
- Publisher
- Elsevier BV
- Published
- 1995-02
- Volume
- 57
- Issue
- 2
- Pages
- 297-299
- ISSN
- 0031-9384 (ISSN-L)
- OpenAlex
- W2031502158
- Cited by
- 32
- References
- 1
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2015: 3 · 2014: 1 · 2013: 3 · 2012: 1
- FWCI
- 0.21
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Physiology & Behavior (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Social Sciences › Gender Studies › Demographic Trends and Gender Preferences
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
- Keywords
- intrauterine position, fetal sex ratio, gerbils, cesarean section, fetal sex determination
- MeSH terms
- Animals, Female, Fetus, Gerbillinae, Male, Pregnancy, Sex Ratio, Uterus
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