Tracking their period

Written by Jen Bell

  |  Reviewed by Staci Tanouye, M.D.

The Teen BLOOM Period Tracker makes tracking easy, but your young person can can also use a regular calendar. Here’s how:

To calculate the average length of their cycle, have your preteen or teen mark the first day of their period, “Day 1” on their calendar each month. Then count the number of days from Day 1 of one period, to Day 1 of their next period. This number is the length of one menstrual cycle. Do this for a total of 6 menstrual cycles (around 6 months) then add up the number of days in each cycle and divide by 6 to get an average of how long their cycle is. Now they have a better idea of when to expect their period moving forward.

For example: 28 days (Cycle 1) + 29 days (Cycle 2) + 29 days (Cycle 3) + 30 days (Cycle 4) + 29 days (Cycle 5) + 29 days (Cycle 6) = 174 days

174 days/ 6 months = average cycle length of 29 days

Next time they get their period, mark Day 1 on the calendar, and then count forward the number of days of their average menstrual cycle. You can mark that day on the calendar as the expected start of their next period. But don’t worry if their period doesn’t arrive on time, it’s normal for their cycle to take several years to settle into a regular rhythm. Still with us? If we lost you there, no worries, it’s super easy to track their cycle with BLOOM’s Period Tracker!

3 Reasons to encourage period tracking

#1 After a few cycles, they’ll likely see a pattern. Then they can know which symptoms to expect, and be ready for them. PMS coming up? They can stash some medicine in their purse. Period due? Stock up on pads so they aren’t caught without!

#2. It is important that preteens and teens keep a journal or use an app to log details about their period flow, color, and any symptoms they may be experiencing. If they’ve been having periods for a while, they will know what their normal flow is like. They can keep track of how light or heavy their bleeding is, and any changes in color and texture. If they notice anything out of the ordinary, they will have the details on hand to share with the doctor.

#3. When tracking, preteens or teens can note any unusual vaginal secretions that occur during the month. They may notice a thicker or stickier discharge in the middle of their cycle — this is normal and is a sign of ovulation.