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1.
S Afr Med J ; 101(2): 131-5, 2011 Feb.
Article in English | MEDLINE | ID: mdl-21678742

ABSTRACT

BACKGROUND: Determining symptoms of menopause in older users of hormonal injectable contraceptives may be challenging, owing to method-induced amenorrhoea, suppression of follicle-stimulating hormone (FSH) and vasomotor symptoms. OBJECTIVE: To investigate menopausal symptoms in women aged 40 - 49 using injectable contraceptives depot-medroxyprogesterone acetate (DMPA), norethisterone enanthate (NET-EN) or combined oral contraceptives (COCs), compared with non-users of hormonal contraception. METHODS: Women using DMPA (N = 127), NET-EN (N = 102), COCs (N = 106) and 161 non-hormonal contraceptive user controls were recruited. Baseline visit serum FSH was measured and information was collected on vasomotor symptoms and menstrual regularity. RESULTS: There was no difference in reporting of vasomotor symptoms between the groups. There was no evidence of a difference in FSH level between non-users (mean FSH 26.7 IU/ml, SD 28.7) and DMPA users (mean FSH 23.1 IU/ml, SD 27.8) (p = 0.64). However, the NET-EN (mean FSH 11.0 IU/ml, SD 10.9) (p = 0.003) and COC groups (mean FSH 12.5 IU/ml, SD 18.7) (p = 0.001) had significantly lower FSH levels compared with the non-user group. CONCLUSION: The lower FSH levels found in the NET-EN and COC users compared with controls may indicate a greater degree of suppression of FSH levels in these two methods, compared with DMPA. Measuring FSH levels may therefore be informative of menopausal status in DMPA users but not in NET-EN or COC users. Vasomotor symptoms may assist in assessing menopausal status in DMPA, NET-EN and COC users.


Subject(s)
Contraceptive Agents, Female/pharmacology , Contraceptives, Oral, Combined/pharmacology , Follicle Stimulating Hormone/blood , Medroxyprogesterone Acetate/pharmacology , Menopause/drug effects , Norethindrone/analogs & derivatives , Adult , Female , Humans , Menopause/blood , Middle Aged , Norethindrone/pharmacology
2.
Contraception ; 68(5): 339-43, 2003 Nov.
Article in English | MEDLINE | ID: mdl-14636937

ABSTRACT

The objective of this study was to investigate whether follicle-stimulating hormone (FSH) levels can be used reliably to indicate approaching menopause in older (aged 40-49), long-term users of depomedroxyprogesterone acetate (DMPA) and norethisterone enanthate (NET-EN). One-hundred and seventeen women using DMPA, 60 NET-EN users and 161 nonusers of contraception were recruited. At recruitment, serum FSH levels were measured and questions were asked regarding menopausal symptoms, menstrual cycle and date of last injection. Results of the recruitment blood test showed that 32% of the nonusers had FSH levels in the menopausal range >25.8 mIU/mL compared to 28% of the DMPA users and 9% of the NET-EN group. After adjusting for age, there was no significant difference between the 3 groups (p = 0.13). An increase of 1 year in age increased the FSH level by 3 mIU/mL (p < 0.001). All the hormonal contraceptive users were between 1 day and 12 weeks of their injection interval. Many had been using the injectable contraceptive method for over 10 years and almost all were amenorrheic at the time of recruitment. The data show that a raised FSH level can be detected during use of DMPA and NET-EN and could be used as a menopausal indicator without interrupting method use in this group of contraceptive users.


Subject(s)
Contraceptives, Oral, Combined/administration & dosage , Follicle Stimulating Hormone/blood , Medroxyprogesterone Acetate/administration & dosage , Menopause/blood , Norethindrone/analogs & derivatives , Norethindrone/administration & dosage , Adult , Biomarkers/blood , Case-Control Studies , Cohort Studies , Female , Humans , Middle Aged , Predictive Value of Tests
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