Just under half of the world’s population have periods in their lifetime. That’s a lot of people — but there are more who will never know what it’s like to bleed every month. If you’re in a relationship with a woman or someone who menstruates, but you don’t yourself, you might feel a little unsure of what they’re experiencing.
One of the best ways you can be supportive of your partner when she’s on her period is to take some time to learn about how her menstrual cycle works. It might have been a while since your biology lessons, but getting refreshed might give you a better understanding of why your partner may not feel at her best at certain times of the month. This will give you the tools you need to communicate so you can offer emotional support and understanding if it’s needed when she’s on her period.
Here, US obstetrician and gynecologist Dr. Jenna Beckham gives the lowdown on how the menstrual cycle works so you can make sense of what’s going on in her body and understand how she might be feeling.
Key takeaways
- It’s common for people to notice symptoms in the run-up to their period, including bloating, food cravings, fatigue, and mood swings. They vary from person to person, so not everyone will feel the same.
- Premenstrual syndrome (or PMS) is the umbrella term for the physical and emotional symptoms that your partner might experience before her period.
- The best thing you can do to support your girlfriend during her period (or at any time of the month) is to talk to her and ask her what she needs.
- With her consent, tracking your partner’s menstrual cycle can give you an idea of when her period, ovulation, and fertile window are likely to be each month. Using Flo for Partners is one way to do this. You can download the Flo app here.
- Knowing where she is in her cycle can help you to know when to offer extra support if she’s experiencing changes in her energy levels, mood, and more.
What you need to know about the menstrual cycle
Before we get into it, you might have heard the terms menstrual cycle and menstruation used interchangeably. But they’re not the same thing.
A period (also known as menstruation, or the days when she bleeds) is only one part of the menstrual cycle — there are lots of other processes and hormonal changes that happen throughout it. Understanding the different menstrual cycle phases can help you get to know what your partner might be experiencing — from when she’s most fertile to why she might feel a bit off in the days leading up to her period.
Her menstrual cycle starts on the first day of her period, and it lasts until the day before her next period. This is usually about 28 days, but everyone’s cycle length is slightly different, and it can change from month to month. A cycle that lasts anywhere between 21 and 35 days is considered normal. “The menstrual cycle is a series of changes in the body, including hormonal changes and changes in organs like the ovaries and uterus, that occur usually each month in order to prepare the body for pregnancy,” says Dr. Beckham.
The menstrual cycle includes two phases, plus two events. They are:
- Menstruation (period): The first event in her menstrual cycle is the lining of her uterus shedding. This is the bleeding you’ll know as her period. “Periods can vary from person to person and even from month to month,” says Dr. Beckham. “It is considered normal if a period lasts between two and seven days, although most commonly, they are three to five days long.”
- The follicular phase: The follicular phase begins on the same day as her period and spans around half of the cycle, ending with ovulation. During this phase, your partner’s hormones (mainly estrogen) rise to stimulate the production of an egg, and cause the lining of her uterus to thicken in preparation for a potential pregnancy.
- Ovulation: Your partner’s ovaries usually release an egg around 14 days before her next period, which is roughly the middle of her cycle. This is the second event in her cycle, known as ovulation, and it’s around this time that she can get pregnant. There are six days in her cycle known as her fertile window. That’s because sperm can live inside her for up to five days, and the egg can then survive for 12 to 24 hours after it’s released. Take note, though: Ovulation won’t necessarily happen on the same cycle day each month.
- The luteal phase: The second phase of her menstrual cycle usually starts after ovulation and lasts about 14 days, ending when she gets her next period. Once the egg has left her ovary, it travels through her uterine (fallopian) tubes to her uterus. If this egg is then fertilized by sperm and attaches itself to her uterine wall (known as implantation), she becomes pregnant. If a pregnancy doesn’t occur, her hormones send a signal to her uterus to shed its lining as a period, and the cycle starts again.