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Small, short study finds benefit of essential oils for menstrual cramps.  The blend of cinnamon, clove, rose, and lavender reduced menstrual cramps over a one month study. I would like to see a longer study, but good results nonetheless.

ER-beta found throughout both the proliferative and secretory phases of the menstrual cycle.  ER-beta expression was higher in the proliferative versus the secretory phases, though not statistically significant.  This makes since as estrogen stimulation dominates the proliferative phase.  Additionally, ER-beta expression was found throughout all levels of the endometrium and the myometrium.

NK cells play role in a woman's menstrual cycle and her fertility.

Does experimental pain response vary across the menstrual cycle? A methodological review

Menstrual variation in salivary testosterone among regularly cycling women.

COMPARISON OF BLOOD SPOT, SALIVARY AND SERUM PROGESTERONE ASSAYS IN THE NORMAL MENSTRUAL CYCLE

estrogen receptor Beta and alpha discussed in the endometrium through menstrual cycle.  This study focus' on human endometrium

progesterone receptor status varies through a woman's menstrual cycle. PR-A dominates throughout, but the PR-A to PR-B ratio declines up to ovulation.

Omega-3 reduced the intensity of menstrual cramps.  Omega-3 reduced the need for rescue ibuprofen.

ER beta appears to be expressed through the menstruation cycle with predominance follicular and early secretory phases. Contrast with ER alpha predominance in late follicular and early secretory phases.

Estrogen receptors alpha and beta show dominance in the proliferative phases, with alpha isoform predominating.  In the secretory phase, less expression of ER was present. ER alpha was predominantly expressed in the epithelial and stromal cells in the proliferative phase.  ER beta was predominantly expressed in glandular cells in the same proliferative phase.   in the luteal phase, ER alpha expression declined in the funtionalis layers.  ER alpha in the basalis remained unchanged.  ER beta in the functionalis layers also declined in the luteal phase.   No relative change was found in the weak expression of ER alpha/beta in the myometrium.

The literature on Testosterone and breast cancer is confusing at best, but just like therapy in men, it needs to be individualized.  This prospective case study found a significant increased odds of breast cancer in women with higher levels of free Testosterone.  Statistical significance was not found with Total Testosterone.  These were endogenous hormones.  The women in this study had "regular menstrual cycles" suggesting these women lacked PCOS.

Salivary testosterone, cortisol, and progesterone: two-week stability, interhormone correlations, and effects of time of day, menstrual cycle, and oral contraceptive use on steroid hormone levels.

Relationship between salivary progesterone, 17-hydroxyprogesterone, and cortisol levels throughout the normal menstrual cycle of healthy postmenarcheal girls.

DDT effects female reproduction and development

Data review finds NAC improves pregnancy rates and ovulation rates in women with PCOS against placebo.  Meta-analysis revealed limited studies on the topic.  When compared to metformin, there was no difference found.  Though, one wonders if attacking insulin resistance through proper diet and additional neutraceutical approach would negate that.  The reason?  NAC and metformin are working in different biochemical pathways.  The authors here seem to not realize this. It appears that they think NAC and metormin are both working in the same manner, but they don't.  The fact that there is still benefit found compared to placebo, despited the authors lack of understanding of what NAC is and does is a positive.

Interesting clinical report on what is termed the "female athlete triad": menstrual dysfunction i.e. loss of menses is not normal and is the result of reduced "energy availability"; sounds like overtraining syndrome.

PR-A and PR-B and regulation of the human menstural cycle.

dysregulated immune system plays role in recurrent miscarriage.  Specifically, this article discusses natural killer cells (NK).

progesterone inhibits prostaglandin production