I’ll share my mom’s story. She’s in her late 50s and going through menopause. She’s been using a few fields, like Jing, Flower of Life, Plasma Beach (a little bit), Cosmo-Volt. Recently she started heavy bleeding after several months of having no period. At the time I recommended her to start the Ojas field. Her flow has since normalized. She will of course go to an OB-GYN to check that everything is okay.
Menstrual blood as mentioned above has a cleansing function. I think the fields neither induce nor halt/delay menstruation specifically, but give vital energy to the body, which it needs to heal itself and regain balance. Because a lot of illnesses, especially for women, are related to hormones, one effect may be that change in the cycle.
Thanks for sharing @OZEN and I hope you can update in a few months, if your cycle has become regular again.