for him
she sent you this for a reason. let's get you up to speed.
Hi. Someone you care about handed you this page, which means she wants you to actually get it: what her body goes through every single month, and why some weeks feel so different from others.
Her body runs on a roughly 28-day cycle with four phases, and the hormones behind it shift the whole time. Good news? There's actually plenty you can do. Here's what's going on in each phase, in plain English, plus exactly how to be the best boyfriend in the room. No biology degree required.
her month, week by week
Four phases, one cycle. Same playbook every month, and once you know it, you look like a genius.
the period itself
Week 1 · Menstruation · Days 1–7ish
what's happening: The lining her uterus spent all month building is breaking down and leaving her body. That's the bleeding. Her two main hormones are at rock bottom, and her uterus is literally cramping (squeezing) to push everything out.
how she might feel: Tired, achy, crampy, low energy. There's no one length: some people are done in 2–3 days, others bleed for a full week. The start is usually the worst, then it eases off. This is not drama. Her body is doing genuinely hard work, and the pain is real.
your job
- lowkey shut your mouth and bring her snacks
- hand her the heating pad before she has to ask
- read “I’m fine” as “please be extra nice to me”
- just do the chore she’s been dreading, no announcement needed
- cancel the big plans, suggest the couch and a movie instead
the comeback
Week 2 · Follicular · Days ~6–13
what's happening: Estrogen is climbing back up and her body is rebuilding. Energy and mood lift a little more every day.
how she might feel: Lighter, more upbeat, up for things. The fog of week one is gone and she's feeling like herself again.
your job
- this is your green light, so plan the date
- say yes to the spontaneous adventure
- she’s got energy again, so ride the wave with her
peak her
Mid-cycle · Ovulation · Day ~14
what's happening: An egg is released and estrogen peaks. This is the highest-energy, most outward point of her whole cycle.
how she might feel: Confident, social, glowy, on top of things. Genuinely her best-feeling stretch of the month.
your job
- hype her up, she’s feeling herself
- great time for the fun plans, friends, going out
- honestly? just enjoy it with her
the storm before the period
Week 3–4 · Luteal (PMS) · Days ~15–28
what's happening: Hormones rise, then drop sharply when there's no pregnancy. That sudden drop is what causes PMS: the bloating, the cravings, the bigger emotions. It's chemistry, not a character flaw.
how she might feel: Bloated, tired, a little moody, and craving everything (especially chocolate and salty things). Feelings hit harder than usual, and she can't just turn that off.
your job
- stock up on snacks NOW: chocolate, salty stuff, her favorites
- never, ever ask “are you on your period?”
- extra patience, fewer opinions
when it's a really bad one
Some periods are just annoying. But for a lot of people the cramps get genuinely severe. There's even a medical name for it (dysmenorrhea), and conditions like endometriosis can crank it up further. If you've never felt anything like it, here's the honest version, so you know she's not exaggerating:
- a muscle deep in her lower belly clenching like a fist and not letting go, sometimes for hours straight
- a dull, dragging ache that spreads into her lower back and down her thighs
- waves that come and go, building until it's hard to think about anything else
- bad enough to bring on nausea, cold sweats, shaking, throwing up, or even fainting
- the kind of pain that keeps her from sleeping, focusing, or standing up straight
Picture this: someone reaches into your gut, grabs a fistful, and slowly wrings it out like a wet towel. Then they do it again every few minutes for hours. Add a sneaky kick to the lower back, a wave of nausea, and the rule that you must smile through a full day of work like nothing's happening. No screaming allowed. That is a regular month for some people. So when she's folded in half on the couch saying she can't move, she is not being dramatic. She's tanking a level of pain you would absolutely tap out of. Believe her, bring snacks, and keep the “just take an Advil” opinions to yourself.
things she'll actually love
Low effort, high reward. A few ideas that land basically every time.
yummy snacks
something cute to help with cramps
spoil her a little
the golden rules
If you forget everything else, remember these.
- “are you on your period?” is never, ever the move
- listen first, solutions second. usually she just wants to be heard
- food fixes more than you’d think
- when in doubt: heat, snacks, and a little quiet
- her pain is real, so believe her, every time
That's it. You officially understand more about her cycle than most people ever bother to. Want the full science?
see how her period actually works →Some links are affiliate links. If you buy through them, the site may earn a little, at no extra cost to you. Educational only — not a substitute for medical advice.