If your daughter has no period yet and you’re wondering when a girl should get her first period, this page can help you understand what’s usually normal, when a late first period may need attention, and what steps to consider next.
Answer a few questions to get personalized guidance for concerns like a first period not started by age 14, a late first period at 15, or no first period by age 16.
The timing of a first period can vary a lot from one teen to another. Many girls start between ages 10 and 15, but the bigger picture matters too, including growth, breast development, family history, nutrition, exercise, and overall health. Parents often search "my daughter hasn't started her period yet" because they want to know what is still within a normal range and when it may be time to check in with a doctor. In general, concern increases if there are signs of puberty but no first period by around age 15, or if there is still no period by age 16. A doctor may also want to evaluate earlier if puberty seems delayed overall.
Some teens simply develop later than their peers, especially if there is a family pattern of later puberty or later first periods.
Low body weight, major weight changes, restrictive eating, chronic stress, or high athletic training can affect hormone signals and delay menstruation.
Thyroid issues, hormone imbalances, certain genetic conditions, or differences in reproductive development can sometimes explain a late first period in teens.
If your daughter is 15 and still has not had her first period, it is reasonable to ask her pediatrician or adolescent health provider for guidance.
A first period not started by age 16 should be evaluated, even if she otherwise seems healthy.
If breast development has not started, growth seems delayed, or there are symptoms like significant weight loss, fatigue, headaches, or excess hair growth, a medical review is especially important.
If you’re concerned about no first period, start by looking at the full puberty timeline rather than age alone. Think about when breast development began, whether growth has been steady, and whether there have been changes in eating, exercise, stress, or health. A doctor may ask about family history, growth patterns, medications, and symptoms, and may decide whether any further evaluation is needed. Most importantly, reassure your daughter that needing more time does not automatically mean something is wrong.
See how concern levels may differ for under 14, ages 14 to 15, ages 15 to 16, and 16 or older.
Understand how other signs of puberty affect whether a late first period is more likely to be normal variation or something to discuss with a doctor.
Get personalized guidance to help you decide whether to monitor, prepare questions for a visit, or seek medical advice sooner.
It can be normal, especially if puberty started later or is still progressing. Age 14 alone does not always mean there is a problem, but the timing of other puberty changes matters.
A late first period at 15 is worth paying attention to. Many teens are still healthy and simply later developers, but this is a common age to discuss the situation with a doctor, especially if puberty signs are limited or there are other symptoms.
If the first period has not started by age 16, medical evaluation is recommended. A clinician can review puberty development, health history, and possible hormonal or physical causes.
Possible causes include normal family patterns of later development, low body weight, intense exercise, chronic illness, stress, thyroid problems, hormone issues, or less commonly, differences in reproductive development.
Yes. Doctors often look at how long it has been since breast development began. If several years have passed without a first period, that can help guide whether further evaluation is needed.
Answer a few questions to better understand whether your daughter’s timing may still be within a normal range or whether it may be time to speak with a doctor.
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Puberty And Periods
Puberty And Periods
Puberty And Periods
Puberty And Periods