It has been observed that at the time of fertilization, the pH of the vagina
may play a role in the selection of X- or Y-bearing sperm and thereby affects
the sex of the offspring [37]. The pH of the vagina is moderately acidic
which varies from 3.8 to 4.5 [38]. Thus, studies have been done and patented,
wherein sperm cells were put in an environment having physiological pH and at
the same time contacting the sperm cells with at least one extra
subenvironment with differing pH to enrich the population of specific type of
sperm cells.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6755399/#ref39
據觀察，在受精時，陰道的酸鹼度
可能在選擇含 X 或 Y 的精子中發揮作用，從而影響
後代的性別 [37]。陰道的酸鹼度為中度酸性
從 3.8 到 4.5 [38] 不等。因此，已經完成研究並獲得專利，
其中精細胞被置於具有生理 pH 值的環境中，並且在
同時與至少一個額外的精子細胞接觸
具有不同 pH 值的亞環境以豐富特定類型的種群
精子細胞。
https://i.imgur.com/1goLAut.png
科學上，ph值對於x/y精子的生存有極大影響。
想問一下版上有兩位以上只有同性別寶寶的爸媽的飲食習慣！
推文格式範例：
兩男，父肉食，母素食。
三女，父素食，母肉食。
感謝大家回覆～