References:

1.     https://www.ed.ac.uk/centre-reproductive-health/hope/what-is-menstruation

2.     https://www.nhs.uk/conditions/periods/

3.     https://www.wateraid.org/uk/media/new-survey-shows-a-lack-of-period-knowledge-across-the-uk-as-wateraid-launches-periodproud

4.     About PMS | NAPS – National Association for Premenstrual Syndromes

5.     Iron | British Dietetic Association (BDA)

6.     The role of water intake in the severity of pain and menstrual distress among females suffering from primary dysmenorrhea: a semi-experimental study | BMC Women's Health | Full Text (biomedcentral.com)

7.     PMS (premenstrual syndrome) - NHS (www.nhs.uk)

8.     Period pain - NHS (www.nhs.uk)

9.     Periods – Brook