SIMSRT said on
" I’m afraid the only method proven to help you conceive of the gender of your choice is via in-vitro fertilization, an expensive laboratory procedure in which a female’s ovum (egg) is harvested and fertilized by her husband’s sperm containing the proper chromosome. Now, there are lots of articles online offering advice that claim to know how you can go about conceiving a girl or a boy, and though they may be fun, you should not take them too seriously. There is no basis in fact that backs up the claim that x chromosomes are slower swimmers, that increasing or decreasing alkalinity determines efficacy of x or y sperm, or that you can conceive of a boy lying on ones’ side or back. Sorry!"