A contraceptive implant is a birth control device inserted under the skin by a doctor. The implant is among the most effective birth control methods. After it is inserted it prevents pregnancy by releasing hormones that prevent ovaries from releasing eggs and by thickening cervical mucous. The implant can prevent pregnancy for up to three years. Though it protects against pregnancy, it does not protect against STIs. The costs for implantation range. Brands include:
- Norplant and Jadelle (Norplant II)
- Sino-implant (II) marketed as Zarin, Femplant and Trust
- Women have fewer, lighter periods
- 30% Women have no more bleeding periods (sign of total efficacy)
- Lasts for up to 3 years (less if overweight)
- Can be used while breastfeeding
- May lessen typical PMS symptoms
For many women, these are not a problem. It is always possible to remove the implant and switch to another form of birth control if the side effects become a problem.
- Irregular bleeding for the first 6–12 months
- Less common: change in appetite, depression, headache, nausea, nervousness, sore breasts
- Weight gain, dizziness, pregnancy symptoms, hair loss, facial hair gain, lethargic feeling.