LAS VEGAS – Though fertility declines precipitously as menopause nears, women in midlife may still conceive. Clinicians and patients need guidance to develop a rational plan for contraceptive management and a clear path to transition to menopausal symptom management, said Dr. Petra Casey at the NAMS 2015 Annual Meeting.
Dr. Casey, professor of obstetrics and gynecology at the Mayo Clinic, Rochester, Minn., noted that the rate of infertility approaches, but does not reach, 100% by age 50, so women need a game plan to take them through the end of their fertile years. These needs are not always met, she said, noting that 75% of pregnancies in women over the age of 40 are unintended.
The rate of spontaneous abortion may exceed 50% by age 45, and chronic diabetes and hypertension are more likely to result after pregnancies in older women. The substantial increase in risk for undesirable outcomes means that an unexpected pregnancy in midlife may cause considerable distress.
No contraceptive method is contraindicated by a patient’s age alone, said Dr. Casey, though it may be wise to reserve combined hormonal contraception (CHC) for women without cardiovascular disease and thrombotic risk. Reminding the audience that risk stratification for CHC for those over 40 years of age is category 2, meaning that benefits generally outweigh the risks, Dr. Casey said, “ ‘What? So a 55-year-old can use combined hormonal contraception?’ Yes!”
Patients may also wish to consider a progestin-only contraception method, a choice that provides endometrial protection. This option allows the judicious addition of estrogen by the most appropriate method to manage symptoms. Choices include a contraceptive implant, a progestin-only pill, or a levonorgestrel-emitting intrauterine device. Depot medroxyprogesterone acetate (DMPA) may be less desirable because of the theoretical risk of bone loss, said Dr. Casey.
Transdermal estrogen delivery is preferred for menopausal doses of estrogen, according to the North American Menopause Society’s guidance for clinical care for midlife. If perimenopausal women are having cyclic vasomotor symptoms or headaches associated with estrogen nadir, transdermal estrogen therapy can be used during the menstrual week. With this option, a higher-dose patch of 0.1 mg will work better to replace endogenous estrogen.
For women who desire nonhormonal contraceptive and menopausal symptom management, a copper IUD, barrier contraception, or sterilization of the patient or her partner can be used in combination with a nonhormonal medication to manage vasomotor symptoms. Though the only Food and Drug Administration–approved nonhormonal option is paroxetine (Paxil) 7.5 mg/day, a variety of choices have been found effective in clinical trials. These include citalopram (Celexa) and escitalopram (Lexapro), venlafaxine (Effexor), desvenlafaxine (Pristiq), gabapentin (Neurontin), and pregabalin (Lyrica).
Contraception should be continued until the patient has experienced 12 months of continuous amenorrhea if over the age of 50 years, or 2 years of amenorrhea if she is younger than 50 years, said Dr. Casey. A predictive model for onset of menopause has been developed that takes age, smoking, bleeding patterns, and estrogen and follicle-stimulating hormone levels into account, but “further study is needed before applying this model clinically,” said Dr. Casey. The decision about when to discontinue contraception also depends on the impact it will have on the particular couple. “Shared decision making is of the utmost importance,” she said.
Dr. Casey disclosed that she is a certified Nexplanon trainer and has received research grant support from Merck.