A woman starts a pack of pills on day 3 of her menstrual cycle, which is within the first five days…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A woman starts a pack of pills on day of her menstrual cycle, which is within the first five days. She takes one pill each day for days. Then there is a gap of days with no pill. Count the days as the days of the cycle, with the day of the first pill as day .
- On which day does she take the last pill of the pack?
- On which day does the gap begin?
- On which day does the next pack start?
Need a reminder? The key ideaShow
The pills are taken for days, and then there is a gap of days. The pills keep FSH and LH low, so there is no LH surge and no ovulation. In a natural cycle the LH surge comes near day . Emergency methods are used within hours of coitus. Injectables and implants act like the pills for a longer time. Saheli is a non-steroidal weekly pill.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Start: day . days of pills. A gap of days.
Plan. Count forward from day .
Step 1. The last pill. , so day .
Step 2. The gap. It begins the next day, which is day , and it ends on day .
Step 3. The next pack. , so day .
Answer: day ; day ; day .
Check. From day to day is days, the length of one round of a pack.
Watch out. Counting days from day gives the last pill on day , not on day . The first pill is also counted.
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