Periods & PMS
References:
1. https://www.ed.ac.uk/centre-reproductive-health/hope/what-is-menstruation
2. https://www.nhs.uk/conditions/periods/
4. About PMS | NAPS – National Association for Premenstrual Syndromes
5. Iron | British Dietetic Association (BDA)
7. PMS (premenstrual syndrome) - NHS (www.nhs.uk)