If fallopian tubes are blocked, what outcome may occur?

• A. Egg cannot travel to the uterus.
• B. Egg production stops.
• C. Sperm production increases.
• D. Ovaries stop producing hormones.

Answer: (A)

The key idea is that natural conception depends on the egg traveling from the ovary through the fallopian tube to meet sperm and then allowing a fertilized egg to reach the uterus. If the fallopian tube is blocked, the egg cannot reach the uterus, so fertilization and implantation in the uterus are highly unlikely. This is why blockage often leads to infertility with natural conception.

Ovulation still occurs because the ovaries continue to release eggs and produce hormones like estrogen and progesterone; the blockage doesn’t stop egg production itself. Sperm production happens in the testes and is not affected by tubal status, so it isn’t increased by a tubal blockage. Similarly, ovarian hormone production isn’t halted by blocked tubes.