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  • Title: Clinical chemistry in women treated with levonorgestrel implants (Norplant) or a TCu 200 IUD.
    Author: Croxatto HB, Diaz S, Robertson DN, Pavez M.
    Journal: Contraception; 1983 Mar; 27(3):281-8. PubMed ID: 6406139.
    Abstract:
    Two groups of implant users and two groups of IUD users participated in the study at different times. In the first groups, fractionation of lipoproteins was performed on serum samples from 28 subjects who had used the implants for 37 months and from 26 subjects who had used the Copper TCu 200 for 30 months. Users of the implants had significantly lower levels of total cholesterol, triglycerides and LDL-cholesterol than users of the IUDs. HDL-cholesterol levels were not different between the groups. In the other groups of women, general chemistries and selected hormone assays were carried out on samples from 30 subjects who had used implants for 51 months and from 24 subjects who had used the TCu 200 IUDs for 43 months. The parameters studied were the SM-12 chemistry group profile, estradiol, cortisol, testosterone, triiodothyronine, thyroxine and thyroid stimulating hormone. In the implant group, mean serum glucose levels were statistically significantly elevated and inorganic phosphorus levels were significantly reduced as compared to the IUD group. In both cases all individual measurements were within the normal range for the population. Testosterone and triiodothyronine levels in the implant group were significantly lower than in the IUD group, but no individual values were outside the normal range for the population. Mean values for all other parameters were not significantly different between the groups. 2 groups of implant users and 2 groups of IUD users participated in this study at different times. In the 1st groups, fractionation of lipoproteins was performed on serum samples from 28 subjects who had used the implants for 37 months and from 26 subjects who had used the copper TCu 200 for 30 months. Users of the implants had significantly lower levels of total cholesterol, triglycerides, and low density lipoprotein cholesterol than IUD users. High density lipoprotein cholesterol levels were not different between the groups. In the other groups of women, general chemistries and selected hormone assays were carried out on samples from 30 subjects who had used the implants for 51 months and from 24 subjects who had used the TCu 200 IUDs for 43 months. The parameters studied were the SMA-12 chemistry group profile, estradiol, cortisol, testosterone, triiodothyronine, thyroxine, and thyroid stimulating hormone. In the implant group, mean serum glucose levels were statistically significantly elevated and inorganic phosphorus levels were significantly reduced as compared to the IUD group. In both cases, all individual measurements were within the normal range for the population. Testosterone and triiodothyronine levels in the implant group were significantly lower than in the IUD group, but no individual values were outside the normal range for the population. Mean values for all other parameters were not significantly different between the groups.
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