Final answer:
The actual average weight gain for women using progestin-only contraception over the first 5 years is not detailed in the provided material. Weight change can differ among individuals with hormonal contraception use. The information does cover the use of birth control methods post-pregnancy and their various health impacts.
Step-by-step explanation:
The average weight gain for women using progestin-only contraception over the first 5 years is not specified in the reference material provided. However, it's important to note that the weight changes associated with contraceptive use can vary widely among individuals. For example, implantable devices like the implantable rod release a progestin that may impact the body's hormonal balance, leading to potential changes in weight. Also, different forms of hormonal contraceptives can influence appetite and metabolism differently, with some women experiencing weight gain while others do not.
The reference material provided does cover that women should wait three weeks after giving birth to begin using birth control that contains both estrogen and progestin due to an increased risk of blood clots. Women with additional risk factors should wait six weeks. It's also mentioned that hormonal birth control methods vary in their composition, with birth control pills containing either a combination of estrogen and progesterone or progesterone only. The information provided discusses the overall health impact of these methods, including their influence on menstrual cycles, the risk of blood clots, and their effect on fertility post-usage.
In regards to pregnancy and weight gain, the material touches on nutritional needs during pregnancy, indicating that most women gain approximately 0.45 kg (1 lb) per week during the second and third trimesters with an increased caloric need of an additional 300 calories per day.