Nothing. You are just not guaranteed to not be pregnant when you start taking them. It's always best to follow the directions on these things...
The symptoms typically start a day or two before menstruation, usually ending when menstruation actually begins.
Negotiation.
Menstruation
Before Puberty begins you are growing at a slightly slower rate.
the age? any time 8-16
What will happen when the melted paraffin wax begins to solidify before casting the subject?
She can't do anything. She'll act natural and just live that her menstruation came right before the azan. If she didn't know until after the azan then Allah swt may accept her fasting because she didn't know.
RNA polymerase is guided to the correct place.
Before an EEG begins, a nurse or technologist attaches approximately 16-21 electrodes to a person's scalp using an electrically conductive, washable paste.
The DNA double helix unwinds.
The Menstruation Cycle has a specific beginning, middle, end, and repeats almost the same every month. Bleeding begins/ends, the uterus begins preparing for the egg, the egg is released, if not fertilized the uterus sheds the extra lining... bleeding begins, ends, the "cycle" begins again. A cycle can be off a day or week, or skipped, but when it resumes, it begins the same steps.
Menstruation typically begins in either late Tanner stage II or early Tanner stage III of puberty.