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Natural Cycles works best for women with regular menstrual cycles who are willing to commit to a routine which involves measuring body temperature most days and adding it to the birth control app. Sperm survival and your ovulation day Ovulation is the point in your menstrual cycle where one of your ovaries releases an egg. Events Christiana Herringham. Since then, the evidence has been mixed , but leans towards disputing any effect of timing on sex selection. With this in mind, we can calculate the fertile window to be 6 days long. But another found hig-calcium diets are more likely to give you a girl. Mothers who ate cereal for breakfast were more likely to have boys in one study. Despite most parents ultimately just wishing for a healthy baby, there are many cultural and social factors that can drive the desire for a baby of a particular sex. Your donation helps deliver fact-based journalism. Medical myths Gender Pregnancy Parenting. Heiresses were more likely to have female children than heirs, self-made billionaires and the general population. Ovulation is the point in your menstrual cycle where one of your ovaries releases an egg.

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Description: In biological terms, your ovulation day is the only day when you can get pregnant, as this is the point when the sperm and the egg actually meet. Since then, the evidence has been mixed , but leans towards disputing any effect of timing on sex selection. Once Natural Cycles has identified your ovulation day, the algorithm will also take sperm survival into account meaning you will always get at least 5 red days prior to your identified ovulation day. There were too few female self-made billionaires just three to be included. One study found that starting your day with cereal might tip the scales towards a boy. Follow us on social media. Christiana Herringham. If sex occurs a number of days before ovulation, the Y sperm die off before they reach the egg, maximising the chances for X sperm to achieve fertilisation. Another found that a low-salt, high-calcium diet favoured girls. Perhaps the most high profile study , published by American epidemiologist Allen Wilcox, found no evidence to suggest that the timing of sex around ovulation led to a significant change in the sex ratio of resulting babies. Read more about how Natural Cycles works here. Image from shutterstock.
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