Sharks have cartilage skeletons with flexible collagenous fibers. They have eight fins: pectoral, pelvic, dorsal, anal, and caudal. Their skin is covered in placid scales called denticles. They can swim using two types of locomotor muscles: red and white
Baby-making sex can feel mechanical and less spontaneous than expected. Medical professionals document decreased sexual desire during conception. More sex can increase chances of conception without assistance. Some couples report limited spontaneity and scheduled intercourse
Sperm are haploid cells containing 23 chromosomes, about 0.05mm long. Male children are born with reproductive organs but no mature sperm. Average ejaculation contains 180 million sperm per milliliter
Stop using all forms of birth control and track partner's ovulation. Wear loose-fitting boxers instead of tight underwear. Eat healthy diet rich in vegetables, whole grains, and lean proteins. Exercise for at least 3 hours weekly, preferably strength training. Quit smoking and limit alcohol consumption to moderate amounts
Sperm are male reproductive cells containing 23 chromosomes. Sperm head carries genetic information, middle contains mitochondria. Tail propels sperm through female reproductive system. Semen carries sperm from testicles to fallopian tubes
Healthy semen appears off-white or slightly yellow. It has a gel-like consistency similar to raw egg whites. Semen typically smells like ammonia or bleach. Normal semen volume ranges from 1.5 to 5 milliliters per ejaculation