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Signs Your Daughter Is About to Start Her First Period

Navigating hormones, mood swings, body changes, and periods might feel like uncharted territory for you. It may be a while since you experienced all of this and the world has changed since then.

But don’t worry— you’ve got this!

Not sure if your child is starting puberty and need some pointers. Here’s everything you need to know to help your daughter through this important stage in her life.

Reassuring your daughter that puberty and periods are normal

Some girls find puberty exciting, while others feel nervous, especially if they’re the first or last in their friend group to go through changes. Your support and reassurance mean everything right now.

The first thing to remind your daughter? She’s unique, and her body will change at its own pace. Puberty usually starts around 11 or 12 but can begin as early as 8 or as late as 18. Her first period might arrive a couple of years after her body starts changing—so it’s a great time to get prepared.

The first signs your daughter has entered puberty might be breast development, and hair growing under the arms and between the legs, but it might still be a couple of years until her first period arrives.

Because your daughter is unique, it’s impossible to predict when she’ll start seeing signs of puberty, so use this time to prepare. Make sure you're prepared so you can provide the information, guidance, and reassurance she needs when she’s ready to talk about her period.

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First Signs Of Puberty

These are the most common signs that your daughter is hitting puberty and may have her first period soon.

  • Breast development
  • Vaginal discharge
  • Mood swings
  • Changes in body shape and size
  • Pubic and underarm hair
  • Body odour 
  • Spots or acne
  • Stomach or lower back, and groin cramps

Signs your daughter has entered puberty.

Puberty doesn’t happen all at once. Here are some common signs that your daughter is growing into her teenage years:

Breast development

This can begin up to two years before her first period. Her breasts may feel tender before noticeable growth happens. She might start feeling self-conscious, so let her know it’s okay to talk about bras when she’s ready.

Why not try giving some gentle guidance and offering to take her shopping for her first bra fitting? Don’t be disappointed or surprised if she declines though, she might need more time, so try again in a few months.

Discharge in underwear

A clear or creamy yellow discharge is normal and often a sign that her period is coming soon. If she’s worried about feeling damp, you could suggest panty liners to help her feel fresh and clean, they’re also great for capturing any first unexpected periods too!

The Lil-Lets range has products to help with periods and discharge.

Changes in body shape and size

Weight and the worry about weight gain can be part and parcel of puberty. Hips may become wider and the tummy a little rounder, reassure her that these changes are natural and a sign of healthy development.

Puberty is such a busy time for the body, it is vital your teen eats a healthy diet. Perhaps consider increasing mealtime portions, if she feels the need to snack a lot between meals.

Pubic and underarm hair

It’s only natural that sprouting body hair might make your daughter self-conscious. If she asks about shaving or hair removal, it’s up to you whether she’s ready. If not, you could suggest revisiting the conversation in a few months.

Body odour and skin spots

OK, so she might be hogging the bathroom longer than you’d like, but she’s trying to get to grips with lots of change. She’ll probably sweat more, need to wash her hair more often, and potentially have a few spots on her face or back. It's worth remembering here that an antiperspirant will prevent sweating and is a better choice than a deodorant that simply masks odours for a few hours.

To make this time positive and less stressful for her, why not help your daughter find some toiletries of her own and offer advice on a good skincare routine, reassuring her that the odd breakout of spots is completely normal.

Noticeable mood swings

Can you remember your teenage years?

One minute she’s happy, the next she’s frustrated or upset. It’s all part of puberty, and sometimes she just needs space. Let her know you’re there to listen whenever she wants to talk.

The teenage years can be a rollercoaster of emotions; and while it’s a strain on her, both physically and mentally, it can be hard on those close by too.

But it’s good to talk, so why not wait until things have calmed and then let her know you understand what she’s going through and offer to listen when she wants to talk?

Stomach, lower back, and groin cramps

Some girls experience cramping before their first period arrives. One of the most common signs of puberty is experiencing cramps in the stomach, lower back, and groin.

It's important to talk to your daughter about ways to manage menstrual cramps, such as taking pain relief, using a heating pad, or practising relaxation techniques.

Cramping is often noticed before a period arrives as the reproductive organs mature and develop and can be very similar to period pain. 

How You Can Support Her

  • Start the conversation early – She may be too embarrassed to bring up puberty or periods, so a simple, casual approach can help. You could say, "Hey, I know your body is changing, and if you ever have questions about anything, I’m here to help."
  • Be prepared – Have pads and pantyliners available at home and in her school bag, just in case.
  • Respect her privacy – She may not always want to talk, and that’s okay. Let her know she can come to you when she’s ready.
  • Encourage self-care – Eating well, staying active, and getting enough rest can make puberty and periods easier to handle.

Puberty and periods are big milestones in your daughter’s life, and with your support, she’ll navigate them with confidence. You don’t have to know everything—just being there, listening, and reassuring her that everything she’s going through is normal will mean the world.

Being Period Prepped

We love empowering conversations.

Join our community at Lil-Lets talk, the place to go if you’ve got questions on parenting, puberty, or absolutely anything else!

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Frequently Asked Questions - First Periods

How long does a first period last?

A first period can last anywhere from 2 to 10 days and may be light, with only a few spots of blood, or heavier. It can also be irregular for the first year or two before settling into a pattern.

What signs should I look for before their first period?

Some of the most common signs of a first period coming soon are; Breast growth, vaginal discharge, growth spurts, pubic and under arm hair growth and of course mood swings.

At what age will my child get their first period?

Most children start their periods between ages 10 and 15, with the average being around 12-13. However, it’s normal to start earlier or later. Look for signs of puberty, such as breast development and vaginal discharge, which can signal that their first period may be coming soon.

What products should I buy for my child’s first period?

It's good to have a mix of period supplies at home and in your daughter's school bag, with pads or liners that will help them manage their period. Go for a regular or mini pad as a first choice.

Will my child’s period be painful?

Yes, for some it may  be a little uncomfortable.  It really does depend on the individual and it's best to discuss period cramps with them before a first period arrives so they know what to expect. If your child does experience cramps or lower tummy and back pain, offer a warm heat pack or show them some stretching exercises that will help.

How can I chat to my child about periods without making them feel awkward?

Keep conversations light and short, let them ask questions, share your own first period experience, have some books or online resources they can look at. And let them know they can chat to you anytime they feel ready.

When should I take my child to the doctor about their period?

If your daughter is 16-18 and has not had their first period it may be advisable to have a quick chat with your doctor, they may simply be late to puberty, but it's always good to get them checked over. Very heavy periods, that require a pad change every 2 hours or less, or feeling sick and dizzy should also be brought to your doctors attention.

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