RPM does not seem to promote the development of male sex characteristics in females. Yet, RPM exhibits P-SARM (Phytochemical Selective Androgen Receptor Modulator) characteristics. These may include testosterone mimetic properties, aromatase inhibition, PDE-5 inhibition, bone density changes, estrogen inhibition, and changes in testosterone:cortisol and tesosterone:estrogen ratios.
Positive bone density changes and PDE-5 inhibition are beneficial to women; testosterone mimetic effects are definitely not that good for a woman; aromatase inhibition and estrogen inhibition are beneficial to women in competitive sports; and changes in testosterone:cortisol and tesosterone:estrogen ratios may be beneficial to women in competitive sports.
What does all this mean? RPM has some benefits for women but may also produce "not-so-desirable" results in other women. Some women, especially in competitive events may find RPM quite useful. Altogether, if you want to be extra careful, you may decide not to recommend it to your female partner, if she is not a competitive athlete. If you end up recommending it though, she should start her dosage low (preferable half the dosage for men) and ramp up, if necessary.