Thinking about starting a family? A little common sense coupled with an ounce or two of prevention can go a long way in having a healthy child. Once you and your partner decide you're ready to be parents, you probably want to get the baby show on the road right away. Many couples are surprised when it takes them six months or more to conceive; after all, haven't we spent most of our reproductive lives trying not to reproduce?

For couples actively seeking pregnancy, the average time to conception is about 8-9 months for couples where the woman is under age 35, says Dr. Matan Yemini, co-director of the Diamond Institute for Infertility and Menopause in Millburn, NJ. If the woman is older, it can take even longer.

But fertility, or a lack thereof, does not rest only with the woman. You and your partner both have important roles to play. You will, after all, contribute half of your child's chromosomes. Indeed, it is your sexual chromosome make-up—XY—that determines the sex of the baby. There are things you can do to increase both your chances of conception and your odds of having a healthy baby.

Let's take a brief look at what's involved in the story of "Sperm Meets Egg."

Here's the short version: The male's sperm must navigate through the female's cervical mucus (now receptive at ovulation to the sperm), travel the length of the uterus, and enter the fallopian tubes.

"Once in the fallopian tube, sperm must meet an egg, penetrate the egg's protective coating and inner membrane, and finally, fertilize the egg," according to the Atlanta Reproductive Health Centre (ARHC).

ARHC notes, "Human conception is a difficult and complex process, even under the best conditions." Your job, then, is to get your sperm ready for the journey of a lifetime.