Does ph affect gender of baby
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The Impact of pH on Baby Gender Determination
Introduction to pH and Gender Determination
The question of whether pH levels can influence the gender of a baby has intrigued researchers for years. The hypothesis is that the pH of the vaginal environment at the time of fertilization may affect the viability or motility of X- or Y-bearing sperm, potentially influencing the sex of the offspring.
Research on pH and Sperm Viability
Rabbit Study on Seminal Fluid pH
A study on rabbits investigated the effects of altering the pH of seminal fluid on the sex ratio of offspring. Semen was diluted with buffers of varying pH levels (5.4, 6.9, and 9.6) and used for insemination. The results showed no significant difference in the sex ratios from the expected 50% males across different pH levels. Specifically, acidic semen resulted in 48% males, neutral semen in 63% males, and alkaline semen in 49% males. This study concluded that pH does not have a significant direct effect on the sex of offspring, although sperm motility was affected by pH deviations from neutrality, with acidic conditions being more detrimental than alkaline ones1.
Human Study on Vaginal pH
In contrast, a study on humans assessed the effect of vaginal pH on fetal sex determination. This prospective study involved 20 patients and found significant associations between vaginal pH and fetal sex. Alkaline vaginal pH was significantly associated with male offspring, while acidic vaginal pH was significantly associated with female offspring. This suggests that vaginal pH could potentially be used as a natural method to influence fetal sex2.
Conclusion
The research presents mixed findings on the impact of pH on baby gender determination. While the rabbit study suggests that pH does not significantly influence the sex ratio of offspring, the human study indicates a potential association between vaginal pH and fetal sex. More extensive research is needed to conclusively determine the role of pH in gender determination.
Sources and full results
Most relevant research papers on this topic
The effects of altering the pH of seminal fluid on the sex ratio of rabbit offspring.
Altering the pH of seminal fluid does not significantly affect the sex ratio of rabbit offspring, but may reduce sperm motility.
Non-RCT
Animal StudyEffect of vaginal pH in preconceptional fetal sex determination
Vaginal pH can be used as a natural method to determine fetal sex, with significant associations between fetal male sex and alkaline pH and fetal female sex and acidic pH.
Does gender of the fetus have any relation with fetal heart monitoring during the first and second stage of labor?
Male fetal gender is associated with higher rates of abnormal fetal heart monitoring during labor, lower Apgar scores, and lower pH values compared to female fetuses.
Observational StudySkin Surface pH in Newborns: Origin and Consequences.
Newborns' skin surface pH is influenced by factors such as pre- and postnatal age, weight, gender, and anatomical site, which impact its integrity and defensive functions.
Determining the sex of baby rabbits by ascertaining the pH of the vagina of the mother before mating.
Vaginal pH before mating in New Zealand white rabbits influences the sex ratio of offspring, with pH levels between 6.34 and 7.34 resulting in more female offspring and above 7.55 resulting in more male offspring.
Non-RCTAnimal StudyAssociations between maternal phthalate exposure and cord sex hormones in human infants.
Maternal exposure to phthalates may affect sex steroid hormone levels in fetal and newborn stages.
Observational Study
Highly CitedThe Impact of Gender on Anthropometric Measures of Twins
Gender influences birth weight in twins, while head circumference and birth length do not, despite being affected by gestational age and birth order.
Observational StudyThe Effects of Fetal Gender on Maternal and Fetal Insulin Resistance
Carrying a female fetus decreases the risk of insulin resistance in the mother, as early as the first trimester.
RCT
Large Human Trial
Rigorous JournalSex Differences in Nutrition, Growth, and Metabolism in Preterm Infants
Male and female fetuses respond differently to the same intrauterine environment, suggesting a fundamental biological variation at the cellular and molecular level.
Highly CitedGender aspects of preterm birth
Boys are more likely to be delivered prematurely, have higher neonatal deaths, and have better outcomes than girls, with males facing greater respiratory distress syndrome risks and pulmonary hypoplasia.
Rigorous JournalHighly Cited