Several: Ovulation issues that may be ovarian issues, fallopian tube dysfunctions, anovulatory cycles, sperm issues in the man, thyroid issues leading to irregular cycles, etc. These are just a few examples of some issues.
Answered 6/7/2017
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2 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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