Preconceptional Selection of Fetal Sex

J, Stolkowski; Lorrain, J

doi:10.1002/j.1879-3479.1980.tb00537.x

Cited by 32 publications

(23 citation statements)

References 8 publications

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“…There have been relevant studies of pre-conceptual maternal diet, investigating variations in both quantity (Verme 1969) and quality of diet (Stolkowski & Lorrain 1980) for an effect on the sex ratio. There have also been studies of the timing of insemination (Guerrero 1974, France et al 1984, Weinberg et al 1995, as well as maternal influences on the uterine environment and sex-selective embryo loss.…”

Section: Introductionmentioning

confidence: 99%

Can mammalian mothers influence the sex of their offspring peri-conceptually?

Grant

Chamley²

2010

Reproduction

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Although controversial, growing evidence from evolutionary biology suggests that the mammalian mother may have a role in influencing the sex of her offspring. However, there is competing information on the molecular mechanisms by which such influence could be manifested. The new initiatives are based on hypotheses from evolutionary biology: the 'good condition' hypothesis, which suggests that post conception, higher levels of maternal glucose may differentially promote the development of male embryos; and the 'maternal dominance' hypothesis, which proposes that before conception, higher follicular testosterone may influence the development of the ovum so that it emerges already adapted to receive an X-or a Y-chromosome-bearing spermatozoon. Now, it seems these hypothesised mechanisms could be operating in synchrony, each complementing and reinforcing the other. On the other hand, there are continuing problems in identifying a precise sequence of mechanisms as evidenced from research in sperm-sorting. Research on high-fat diets and the sex ratio in polytocous species may indicate important differences in proximate mechanisms for sex allocation between polytocous and monotocous mammals.

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Section: Introductionmentioning

confidence: 99%

Can mammalian mothers influence the sex of their offspring peri-conceptually?

Grant

Chamley²

2010

Reproduction

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“…Enabling only one of the two types of sperm to penetrate the depending on which diet is adhered to. Langendon and Proctor first published 'the preconception Gender Diet `based on results reported [17].…”

Section: Discussionmentioning

confidence: 99%

Role of sodium and potassium ions in identification of offspring gender in rats

Chandraju¹,

Beirami²,

Kumar³

2012

iosrphr

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Abstract--Effects of Sodium and Potassium in diet to determine rats baby have been investigated.20 healthy rats chosen from the first generation of the previous experimented rats ,were divided into two groups in the ratio male to female 1:5. The first group was Na and K, the second group was control unit without Na and K. It was found that the delivered offspring male to female ratio were 2.61:1 and 1.02:1 for the first and second groups respectively. Also, it was found that rats fed with (Na, K) food yields maximum numbers of male offspring 68, while rats fed with normal food yields lowest numbers of male offspring 48.

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“…Il est bien connu que le taux de masculinité à la naissance (TM = nombre de naissances mâles pour 100 naissances) est relativement constant et voisin de 51,5 chez les Mammifères (Courot, 1975 (Beatty, 1970 ;Schwartz, 1975 (Courot et Esnault, 1973 ;Courot, 1981 (Stolkowski, 1967 ;Stolkowski et Emmerich, 1971 ; Lefèvre, 1977) et dans l'espèce humaine (Stolkowski et Duc, 1977 ;Stolkowski et Lorrain, 1980 ;Stolkowski et Choukroun, 1981) (Epel, 1977 ;Yanagimachi, 19811. …”

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Influence de l'alimentation minérale de la truie sur le taux de masculinité à la naissance

Bolet¹,

Guéguen²,

Dando³

et al. 1982

Reprod. Nutr. Dévelop.

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Summary. Effect on sex ratio of mineral diet in sows.This paper reports a study on sows to check the theory of Stolkowski which hypothesizes that mineral imbalance in the diet of the female before fertilization affects the sex ratio of the progeny. Relative excess of Na and K ions (NaK diet) would favour the birth of males, while relative excess of Ca 2+ and Mg 2+ ions (CaMg diet) would favour the birth of females. We carried out two successive experiments. In the first, sows were given the diet for about 34 days, the molar Na + K/Ca + Mg ratios being 2.1 for the NaK diet and 0.7 for the CaMg diet. Out of a total of 677 births, the sex ratio was 55.7 with the NaK diet and 48.3 with the CaMg diet. In the second experiment, the sows were treated for about 53 days and the molar ratios were 3.9 for the NaK diet and 0.5 for the CaMg diet. Out of a total of 869 piglets, the sex ratios were 50 and 53.5, respectively. Thus, the difference observed in experiment 1 (0.05 < P < 0.10), which agrees with the above mentioned theory, was reversed in experiment 2, the diet-experiment interaction being significant (P < 0.05). Overall, the diet did not affect the sex ratio ; the contradictory results of the two experiments showed no reproducible effect of dietary mineral imbalance on the sex ratio in pigs. There was also a significant diet-experiment interaction (P < 0.05) as to litter size, and a nearly significant negative relationship between sex ratio and litter size was observed.Introduction.

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Preconceptional Selection of Fetal Sex

Cited by 32 publications

References 8 publications

Can mammalian mothers influence the sex of their offspring peri-conceptually?

Can mammalian mothers influence the sex of their offspring peri-conceptually?

Role of sodium and potassium ions in identification of offspring gender in rats

Influence de l'alimentation minérale de la truie sur le taux de masculinité à la naissance

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