Some fertility problems are more easily treated than others. In general, as a woman ages, especially after age 35, her chances of getting pregnant go down. But her risk of miscarriage goes up.
If you are 35 or older, your doctor may recommend that you skip some of the steps younger couples usually take. That's because your chances of having a baby decrease with each passing year.
It's important to understand that even if you are able to get pregnant, no treatment can guarantee a healthy baby. On the other hand, scientists in this field have made many advances that have helped millions of couples have babies.Thus, water pollution is all about quantities: how much of a polluting substance is released and how big a volume of water it is released into. A small quantity of a toxic chemical may have little impact if it is spilled into the ocean from a ship. But the same amount of the same chemical can have a much bigger impact pumped into a lake or river, where there is less clean water to disperse it.
Water pollution almost always means that some damage has been done to an ocean, river, lake, or other water source. A 1969 United Nations report defined ocean pollution as:
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