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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to worry about my 15-year-old missing 2-3 period?

82 replies

Elphabayo · 30/06/2026 22:51

looking fur advice
my 15 yo started her period at 10 has been largely regular since around 11-12 however no period since 15th April
she’s not sexually active I’m really sure of that
she has gained a stone over past year but she’s not overweight

coincidentally I’m 45 and have not had a period for 45 days when I usually have them every 27-32. Days i was also very regular! I can’t work it out? Anyone had similar

OP posts:
itsme189 · 01/07/2026 08:31

I would say to her “this needs a doctors trip but they will first want to rule out that you aren’t pregnant. I know you aren’t sexually active but let’s do the test to prove it so they can investigate what it is”

Jan24680 · 01/07/2026 08:32

You need a proper chat and a pregnancy test. Don't leave it too late to have an abortion, especially if she is being abused, which she is at 15. If you go to the GP it's what they will do first as it's easy. Hope you find out what's wrong soon.

wishingonastar101 · 01/07/2026 08:40

I always think - what will the gp do.

  1. take a pregnancy test
  2. take stats - temps, weight, blood pressure, ask about pain, stress etc...

Do these first. include the pregnancy test in with the other tests.

Holdinguphalfthesky · 01/07/2026 08:53

I can’t speak for the PCOS speculation, but my own periods were generally 24-27 days and then at 42, 43 I had cycles of 17 days and of 37 days. I also had other signs of perimenopause (hot nights, losing words, and I’d had a major depression at 40 which can also be linked). For me the POP plus the Health & Her Perimenopause supplement sorted the periods and some of the symptoms for a couple of years until I went on HRT. My yoga teacher alerted me to the fact that peri can and commonly does start way earlier than 45. So for you, I would be assuming it’s that.

Pp suggested a good way of talking to your daughter: “the GP will definitely want to rule out pregnancy so let’s do a test before we go, they won’t do much else until they have confirmed no pregnancy” it’s blame-free and true too. You could offer her to go into the doctor by herself if she’d be more comfortable doing that, but maybe brief them in advance of the issue by email or via the receptionist who can add notes to the appointment.

TeaAndStrumpets · 01/07/2026 09:00

My DD had an ovarian cyst at that age. She was in pain as it grew and we thought it could be appendicitis. You couldn't tell by looking at her but the GP could feel a large mass and sent her straight off for an ultrasound. She had an operation to remove it and no problems with fertility in later life.

Elieza · 01/07/2026 09:11

do a test first and photograph the results “to save time at the gp as it’s the first thing they will ask and i dont want to have to make a second appointment to come back again when we already know it’s going to happen so let’s get this done first”

Farageisacupidstunt · 01/07/2026 09:11

Yetanotherone12 · 01/07/2026 00:00

except she has been “largely regular” for the 5 years since she started, and isn’t overweight.

Being "largely regular" and not overweight during teenage years does not mean that she doesn't have PCOS or rather PMOS as we now, thankfully, have decided it should be called.

Matildatoldsuchdreadfullies · 01/07/2026 09:13

My DD hadn’t have a period at all, so different. But by 15 she was understandably concerned. I booked a doctor’s appointment, and asked if she wanted me to come with her. She very much did. I told her that they would ask me to leave the room at some point to ask if she could be pregnant, and that I would obviously go… but if she really didn’t want me to leave, I wouldn’t.

At no point did they even mention the possibility of pregnancy. I found that shocking. She was physically developed, btw, although slim. It’s the very first thing I would have expected them to raise.

So, no, they won’t necessarily assume pregnancy.

Luckyforsome23 · 01/07/2026 09:14

Ask her to pee in a cup for the gp and do a pregnancy test yourself first to be sure. Is she stressed, my periods stopped during exams and restarted afterwards when I relaxed.

Honeyhonayboo · 01/07/2026 09:20

Farageisacupidstunt · 01/07/2026 09:11

Being "largely regular" and not overweight during teenage years does not mean that she doesn't have PCOS or rather PMOS as we now, thankfully, have decided it should be called.

Surely if you don’t have irregularly periods and you don’t have high androgen levels, which is generally the reason for weight gain in these cases, you can’t meet 2 of the criteria? The only thing left is cysts which in its own isn’t pcos.

Sartre · 01/07/2026 09:21

I think insisting on a pregnancy test will unnecessarily humiliate her. She’s said she isn’t sexually active so you should trust this, particularly if there’s limited chance she even could have had sex. I don’t know how open your relationship is with her but I know my teen DD’s would tell me if they had sex and 100% if they thought they could be pregnant.

FartSock5000 · 01/07/2026 09:28

Buy the pregnancy test and if negative, ask GP to test for PCOS.

ididabigfatsmelly · 01/07/2026 09:31

F

OriginalSkang · 01/07/2026 09:49

I would buy a pregnancy test and put it to her that if she goes to the GP they will !00% ask her to do one anyway, just to rule it out before they continue

takeharry · 01/07/2026 09:55

Elieza · 01/07/2026 09:11

do a test first and photograph the results “to save time at the gp as it’s the first thing they will ask and i dont want to have to make a second appointment to come back again when we already know it’s going to happen so let’s get this done first”

This.

I advised someone with sinus eye pain to see an optician before the GP as it’s the first thing they ask, so better to do it before contacting GP so you don’t get stopped at the first hurdle. Same idea really.

Farageisacupidstunt · 01/07/2026 10:06

Honeyhonayboo · 01/07/2026 09:20

Surely if you don’t have irregularly periods and you don’t have high androgen levels, which is generally the reason for weight gain in these cases, you can’t meet 2 of the criteria? The only thing left is cysts which in its own isn’t pcos.

There are so many more symptoms of PMOS than just irregular periods and (visible signs of) high androgen levels. Ignorance of the condition is one of the main reasons why it has been renamed. It is entirely possible to have very few of the classic symptoms during teenage years, only for them to manifest later.

LoafofSellotape · 01/07/2026 10:07

Random321 · 30/06/2026 23:02

Don't insist on a pregnant test.

If she is pregnant and unable to tell you, it will only make things worse.

If she isn't, forcing her to do a test, twll her her mum doesn't trust her word.

Tell her you are concerned and are booking a GP to get her checked out. It will get her talking more at the least.

I agree with this .

firstofallimadelight · 01/07/2026 10:16

I’d take her to gp as first step.
As long as you are not pregnant it’s probably peri

EgregiouslyOverdressed · 01/07/2026 10:22

Definitely take her to the GP. A pregnancy test will be the first thing they do so warn her of this. Take a urine sample.

WetBandits · 01/07/2026 10:30

I agree take her to the GP. As a sexual health nurse, I see teens every day that don’t tell their parents they are sexually active, so you really cannot be certain, but the GP will want to do a pregnancy test so at least you won’t have to be the one to ask her to take one.

ilovemybluesharpie · 01/07/2026 10:34

DD didn't have a period for several months. I knew that she wasn't having sex. She was under a Paeds Consultant for something else and I asked them to refer her for PCOS.

DD was 16/17 and the Gynie Consultant said they don't usually diagnose that young but there were 3 symptoms for diagnosis and DD had all 3. She lost some weight and her periods returned.

I would sit down with your DD and calmly and gently talk to her to see if there is any chance that she could be pregnant. Otherwise, all you can do is take her to the GP and see if they will refer her anywhere.

Rosesandthorns66 · 01/07/2026 10:40

Hi,
Firstly I recommend that you book an appointment with the GP.
Secondly, taking a multivitamin supplement could be useful.
My daughter was in a similar situation and when I booked a GP appointment, she was given some blood tests. Her vitamin levels were low. My daughter says eating a vitamin supplement helps her periods stay regular.
In my daughter's case it was the vitamin B12 and iron that she was low in.
Hope this reply helps and best wishes.

ThisOliveKoala · 01/07/2026 10:44

Jan24680 · 01/07/2026 08:32

You need a proper chat and a pregnancy test. Don't leave it too late to have an abortion, especially if she is being abused, which she is at 15. If you go to the GP it's what they will do first as it's easy. Hope you find out what's wrong soon.

What if the boy is 15 or 14?

Honeyhonayboo · 01/07/2026 10:53

Farageisacupidstunt · 01/07/2026 10:06

There are so many more symptoms of PMOS than just irregular periods and (visible signs of) high androgen levels. Ignorance of the condition is one of the main reasons why it has been renamed. It is entirely possible to have very few of the classic symptoms during teenage years, only for them to manifest later.

In the UK you need at least 2 out of the 3 main symptoms. If you don’t have these you will not be diagnosed with the condition.

Brandyb · 01/07/2026 11:02

Sudden weight-loss could also be a factor - anorexia, or other ED - but it doesn't sound like that is the case?