Hello! I'm Dr. Emily, a board-certified gynecologist with over 15 years of experience in women's health. I'm here to provide you with accurate and reliable information about menstruation.

There is no set weight to start periods. While body weight can play a role in the onset of menstruation, it's not the sole determining factor.
Menarche, the first menstrual period, is a complex process influenced by several factors, including:

* Genetics: Family history plays a significant role in when a girl starts her period. If your mother, sisters, or other close female relatives started their periods early or late, you are likely to follow a similar pattern.
* Nutrition and overall health: Adequate nutrition and good health are essential for normal hormonal development. Deficiencies in essential nutrients like iron, zinc, and protein can delay the onset of menstruation.
* Body fat percentage: A certain level of body fat is required for the production of hormones like estrogen, which are essential for menstruation. While being overweight or obese can sometimes lead to earlier periods, it's important to remember that **a healthy weight is crucial for overall health**.
* Ethnicity: Different ethnic groups may have varying average ages of menarche.
* Stress levels: High stress levels can disrupt hormone balance and delay periods.

**It's essential to remember that every girl is different, and there's a wide range of normal when it comes to the age of menarche.** While some girls start their periods as early as 8 or 9 years old, others may not start until they are 15 or 16.

**If you are concerned about your daughter's menstrual development, or if you have any questions about your own menstrual cycle, it's essential to consult with a healthcare provider.** They can assess your individual situation, address any concerns, and provide appropriate guidance.

**Remember, there's no need to panic if your daughter's period hasn't started yet. It's crucial to be patient and focus on her overall health and well-being. Focus on providing her with a healthy diet, regular exercise, and a supportive environment.**

I hope this information helps. Feel free to ask any further questions you may have.
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Surprisingly, it's true that most girls weigh around 100 pounds when their periods start. Since starting your cycle requires a certain amount of body fat, girls who are skinnier or very involved in sports may start a little later.read more >>