Speed vs. Endurance
Natural Baby Selection
Dr. Shettles of Columbia University’s College of Physicians and Surgeons, a specialist in the field of reproductive physiology, asserts there are two types of sperm:- Boy Sperm: “Y” sperm is smaller and round headed which, if successful, fertilise the ovum to produce XY chromosomes which results in a baby boy.
- Girl Sperm: “x” sperm, with a larger oval head, which if successful fertilises the ovum to produce xx chromosomes which result in a baby girl
17 February, 2014