Local fertility experts are wrestling with a heartbreaking problem known as 'secondary infertility,' where a woman can have a baby, but then can't have any additional children, 1200 WOAI news reports.


  "If you have been trying for over a year, even though you already have a child, you're trying for number two or number three, you probably need to see somebody," Dr. Thomas Pool, Ph.D., the scientific director of the Fertility Center of San Antonio, told 1200 WOAI's Stephanie Narvaez.


  'Secondary Infertility,' also called Polycystic Ovary Syndrome, affects a woman's menstrual cycle and their ability to have children.  As many as 3 million women of child bearing age have the syndrome, according to experts.


  Researchers aren’t sure what causes it, they think it is connected to the fact that women are beginning having children later while career goals take precedence, and many simply 'age out' of fertility.  But other cases include blocked fallopian tubes, and problems with the man's sperm.


  But many cases of secondary infertility are 'unexplainable,' and that's where Dr. Pool and other researchers at the Fertility Center of San Antonio, come into play.


  "What we see in our center, if people can hang in there long enough, and fertility therapy can be very frustrating, most people do conceive," he said.  "There is great hope for people who are experiencing fertility, either as a first time thing or a second time thing."


  Researchers also say that women are hampered in seeking help from scientists like Dr. Pool because demanding a second child is seen as 'greedy.'


  Many of their relatives say they should simply be thankful for one children and not covet a second.