there are lots of pregnancy complications that can impact fertility. example gestational diabetes, miscarriage, if you contacted STD during pregnancy etc.

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Here are some more:
1)preeclampsia
2)placenta previa
3)low amniotic fluid

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here's what I got about fibroids, according to wdxcyber:

"Fibroids do not affect the fertility of the majority of women sufferers. Fibroids that grow in the womb cavity tend to cause more problems with infertility. Some fibroids block the openings to the fallopian tubes or make implantation very difficult. In certain situations surgery is used to remove the fibroid, usually via key hole surgery. Generally this alleviates the cause of the infertility."

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thanks guys for the help..i got the answer to my problem ;D

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ectopic pregnancy. this is often caused by damage to the fallopian tubes. If you have an ectopic pregnancy, you will need quick treatment to end it before it causes dangerous problems

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abortion can be one.

Women who have had a previous abortion have 200% increased risk of miscarriages after two or more abortions, 160% increased risk of tubal (out of the womb) pregnancy, and increased risk of abnormal positioning of the baby in future pregnancies.

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Additional info. of abortion:

a little more than 4% of these women have immediate complications like bleeding, perforation of uterus, retained parts of fetus in womb, infection
Those under 20 also have 150% chance of having injury to their cervix (mouth of womb)...so, this has an impact of future infertility

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