There is no single answer to this question as it is different for everyone. Some girls may feel like they become women when they get their periods, while others may not feel this way until later on in life. There is no right or wrong answer, it is simply a personal experience. For some girls, getting their period may be a sign that they are becoming more mature and grown up. This can be a positive experience and help them to feel more confident in themselves. However, for other girls it may be a reminder of the fact that they are not yet adults and can still be seen as children by society. It can be confusing and frustrating trying to figure out where you fit in during this time of change. Ultimately, though, it is up to each individual girl to decide when she feels like she has become a woman.