The ability to determine if and when to become pregnant, is vital to a woman's autonomy and well being, and contraception can protect girls and young women from the risks of early pregnancy and older women from the increased risks of unintended pregnancy. Adequate access to contraception can limit multiple pregnancies, reduce the need for potentially unsafe abortion and reduce maternal and infant mortality and morbidity. Some barrier forms of contraception such as condoms, also reduce the risk of STIs and HIV infection. Access to contraception allows women to make informed choices about their reproductive and sexual health, increases empowerment, and enhances choices in education, careers and participation in public life. At the societal level, access to contraception is a key factor in controlling population growth, with resultant impact on the economy, the environment and regional development.[58][59] Consequently, the United Nations considers access to contraception a human right that is central to gender equality and women's empowerment that saves lives and reduces poverty,[60] and birth control has been considered amongst the 10 great public health achievements of the 20th century.[61]
Having the proper footwear is essential for any workout, and for winter runs, that means sneaks with EVA (ethylene vinyl acetate), says Polly de Mille, an exercise physiologist who oversees New York Road Runner's Learning Series for first-time New York City Marathon runners. “Polyurethane tends to get really stiff and cold in the winter, which could increase your risk of injury.” Another important feature is a waterproof and windproof upper: Look for shoes made with Gortex, or wrap your mesh uppers in duct tape to keep feet dry and warm.
B12: Like folic acid, B12 is essential for healthy nervous system development and function. Pregnant women who are vegans or vegetarians may fall short on B12, since it is present in animal protein and to a lesser extent in dairy. Teenage and adult women need 2.4 mcg. Recommended levels rise to 2.6 mcg for pregnant women and 2.8 mcg for lactating women.
Changes in the way research ethics was visualised in the wake of the Nuremberg Trials (1946), led to an atmosphere of protectionism of groups deemed to be vulnerable that was often legislated or regulated. This resulted in the relative underrepresentation of women in clinical trials. The position of women in research was further compromised in 1977, when in response to the tragedies resulting from thalidomide and diethylstilbestrol (DES), the United States Food and Drug Administration (FDA) prohibited women of child-bearing years from participation in early stage clinical trials. In practice this ban was often applied very widely to exclude all women.[151][152] Women, at least those in the child-bearing years, were also deemed unsuitable research subjects due to their fluctuating hormonal levels during the menstrual cycle. However, research has demonstrated significant biological differences between the sexes in rates of susceptibility, symptoms and response to treatment in many major areas of health, including heart disease and some cancers. These exclusions pose a threat to the application of evidence-based medicine to women, and compromise to care offered to both women and men.[6][153]