Plan B delays ovulation for about five days, according to Choice to Live With. Plan B, also known as the morning-after pill, is a form of oral medication that serves as emergency contraception. It is taken after unprotec... More »

According to the Plan B website, most women get their next period on time or earlier than expected after taking Plan B. Taking Plan B multiple times during a cycle can cause menstrual changes, including delaying your per... More »

There are no known interactions when using the Plan B pill concurrently with antibiotics, according to McKinley Health Center. While no formal studies have been conducted to determine changes in efficacy due to medicatio... More »

A woman’s ovulation date typically occurs 12 to 16 days before the menstrual cycle begins, according to WebMD. The ovulation date varies depending on the typical length of the menstrual cycle. Women who have an average 2... More »

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Polymyxin B eye drops are used for seven to 10 days to treat bacterial conjunctivitis and blepharoconjunctivitis. This medication's use as a single agent has been discontinued. Instead, it is prescribed in combination wi... More »

The fertility drug Clomid can cause a one- to three-day delay in ovulation, explains the Reproductive Medicine and Surgery Center of Virginia. This may or may not delay the start of a woman's cycle. Clomid works by stimu... More »

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Bats copulate indiscriminately just prior to fall hibernation, but a female bat delays her ovulation and stores the sperm for approximately seven months before allowing fertilization. In relation to their size, bats have... More »