This number (37.5 Mb) gets reported all of the time and it's very wrong. A single sperm has 3.5 billion base pairs of DNA in it. Since there are 4 possible bases, that means each position in DNA could store four bits of information. That gives 14 billion bits of information. Assuming 8 bits per byte, that 1.75 billion bytes of information or 1.63 Gb (at 1,073,741,824 bytes per gigabyte). That corresponds to roughly 43 times as much information as 37.5 Mb.