Bad Habit May Prevent You From Giving Birth to a Son - KCBD NewsChannel 11 Lubbock

Researchers looked at 12,000 births and asked parents about their smoking habits around the time of conception. They found that a much smaller number of male children were born to men who smoked.

Experts say one possible explanation is that sperm cells carrying the y or male chromosome are more sensitive to toxins in cigarette smoke than x or female chromosome bearing sperm.