It is important to understand, first of all, that the only way that you can with any certainty make sure that you are going to conceive a girl is with help from a fertility specialist. Using a procedure such as in vitro fertilization (IVF) or intrauterine insemination (IUI), a fertility health care provider can separate the man’s sperm into those sperm that will produce a girl and those sperm that will produce a boy. Even so, this method is not 100% effective, and you can sometimes wind up surprised. In addition, few people would be willing or able to use such a fertility health care provider solely for the purpose of conceiving one gender or the other.

Fortunately, there are things that you can do to improve your chance to conceive a girl. To understand how this works, it is important to understand how the sperm determine gender. There are, essentially, two different types of sperm: those that produce girls, and those that produce boys. The two types of sperm tend to be different in a variety of ways. The sperm that produce boys tend to be “stronger” sperm than the sperm that produce girls. However, the sperm that produce boys also tend to die off quicker than the sperm that produce girls.

Knowing this, there are things you can do to help conceive a girl. To conceive a girl, you should have intercourse a few days (generally 3 or 4 days) prior to the time that you ovulate. This allows the sperm that produce a boy to die off, and gives the sperm that produce a girl the chance to fertilize an egg and conceive a girl. This is known as the “Shettles method.” Also, according to the Shettles method, you can conceive a girl by having only shallow penetration during intercourse, which deposits the sperm closer to the vaginal entrance. The vaginal entrance is more acidic than the rest of the vagina, and this will work against the boy sperm. Also, the Shettles method suggests that to conceive a girl you should avoid orgasm during intercourse, as orgasm produces secretions that make the vaginal environment more hospitable to the sperm that produce boys.