How Long Do Male Sperm Last

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. The medical technology for sex selection of embryos has existed in Australia for many years, but such an option is only available for medical reasons, such as sex-linked chromosomal disorder. This leaves parents who do have a gender preference looking for natural ways of predetermining the sex of their baby. In the s, the idea that timing sex around ovulation can tip the odds in favour of a girl or a boy was popularised by Shettles and Rorvik in the best-selling book How to Choose the Sex of Your Baby. However, Y sperm live fast and die young. 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.
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Can you Really Influence the Sex of Your Baby?

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Determining Your Fertility Window

Getting Pregnant. If you are new to the trying to conceive TTC world, you are probably learning more than you ever thought you would need to know about how your reproductive system works. Therefore, couples trying to conceive should plan to have intercourse a number of times in the days just prior to ovulation. To do this means you must be able to predict when you will ovulate, a task that is sometimes more difficult than you might think. Fortunately, for those of us who need help, there are several reliable ways to predict when your most fertile days will occur during each cycle. Before we embark on a discussion of how to pinpoint your fertile window, it might be helpful to briefly review the stages of your menstrual cycle , as hormonal changes that occur during the different phases set the stage for ovulation and provide clues as to when ovulation is coming.
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Determining Your Fertility Window

Boy or Girl? Some people believe you can deliberately affect the chances of having one of the other. By Sarah Lawson. In a study was published which suggested that high calorie diets produced boys.
Whether your baby is a boy or a girl is determined by the chromosome it inherits from its father. The egg from its mother always contains an X female chromosome, but the sperm contains either a female or a Y male chromosome. When the egg is fertilized the chromosomes come together and if they are XY a baby boy is conceived and if they are XX a baby girl is conceived. In the s Dr Shettles found that female and male sperm had different characteristics. He believed that identifying these differences may help couples to try to conceive a boy or a girl.
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