According to Southern California Reproductive Center, there are six things that can affect female fertility.
In fact, a female was born with all the eggs you will ever have. You don't lose them one by one - you lose them exponentially. There can be many factors contributing to infertility, sometimes making it difficult to determine what is causing the infertility problem. After knowing some factors that affect fertility, it can help improve the chances of conceiving. They can be classified into 3 types: the good, the bad, and the ugly.
The Good:
Birth control pills: It's commonly believed to prevent pregnancy for birth control pills. In fact, it has other functions of helping protect future fertility. It can not only reduce the risk of ovarian cancer, but also can decrease the risk of upper genital tract infections as it can thicken cervical mucus and increase the activity of the ovary.
The Bad:
Alcohol: Excessive alcohol use are harmful to the liver, it can also lead to risky and unsafe sexual practices....................READ MORE @

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Where is the ugly? your write up is very amature need more medical and scientific details