Summer not the best time to conceive, UCLA research says

LOS ANGELES, California -- With summer's typically high temperatures, scientists say it's probably not the best time for couples to conceive.

UCLA researchers say hot weather reduces the chance of getting pregnant and it's likely to get worse due to global warming.

The new study found sperm production falls in hot weather.

The scientists say there's also a reverse effect: birth rates increased for several months once the temperatures dropped.
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