Is Intrauterine Copper Contraceptive safe while breastfeeding?

Effects on the breastfed infant

An open-label, two-center, randomized study in breastfeeding women compared a copper-containing IUD (Multiload Cu250) with an oral progestin-only contraceptive (lynestrenol 500 mcg). There were no statistically significant differences between groups with regard to infant anthropometric parameters and child health, except a lower incidence of child illness after 6 months in the lynestrenol group.[ 4 ] Three hundred twenty lactating women were randomized to either a copper-containing IUD (Copper T380A; n =157) or to an IUD containing levonorgestrel (Mirena; n =163). Follow-up of infants for 1 year found no differences in growth and development or in duration of breastfeeding.[ 5 ] A study compared the performance of a copper-containing IUD (Copper T 380A; n = 122), progesterone vaginal rings (n = 187), an oral progestin-only contraceptive (lynestrenol 500 mcg; n = 117), and levonorgestrel implants (Norplant; n = 120) in lactating women. After the first year of use, none of the methods affected the rate of infant growth.[ 6 ] In a multicenter study, women who received a (Copper T 380A; N = 734) intrauterine device were compared to women who received a vaginal ring that released about 10 mg daily of progesterone (N = 802) beginning at day 29 to 63 postpartum. After the first year of use, no significant differences were found in the health and weight gain of the infants in the 2 groups.[ 7 ]

Effects on milk supply

A study compared prolactin serum concentrations in 40 women using a copper-containing intrauterine device (Copper T, Copper 7 or Soonawalla Y) to those of 20 women who were using condoms or practicing abstinence. Serum prolactin levels were higher in lactating women using a copper IUD (n = 7) than in lactating controls (n = 5) and in nonlactating women using a copper IUD (n = 33) than in lactating controls (n = 15). The authors also noted that they had seen 12 women with galactorrhea who were using a copper IUD, although they did not establish a cause-and-effect relationship. None of the study patients had galactorrhea.[ 8 ] A 30-year-old woman had been using a copper IUD (Gravigard) for 19 months when she noted spontaneous galactorrhea, mostly from the left breast. Thyroid function and basal serum prolactin levels were normal and a brain tumor was ruled out. Three months later, the IUD was removed and milk production stopped 7 months after removal. The patient used no IUD for 3 months, then the copper IUD was replaced. Mild spontaneous lactation began 3 days after IUD placement, mainly from the right breast. The patient was taking no medications that would cause galactorrhea. The galactorrhea was probably caused by the IUD.[ 9 ] Eighty-four women had 6 subdermal implants containing 100 mg each of progesterone inserted between days 30 to 35 postpartum as a contraceptive. Compared to women who received either a placebo or a Copper T intrauterine device, no difference was found in the breastfeeding rates during the first 9 months postpartum. At 1 year postpartum, more women in the Copper T group were breastfeeding than in the progesterone or placebo groups.[ 10 ] An open-label, two-center, randomized study in breastfeeding women compared a copper-containing IUD (Multiload Cu250) with an oral progestin-only contraceptive (lynestrenol 500 mcg). There were no statistically significant differences between groups with regard to the amount of milk production or number of da

Levels in milk

Maternal Levels. The effects on maternal copper metabolism during breastfeeding were compared in 3 groups of women. Two groups used copper-containing intrauterine devices (Copper 380A [n = 33] and Copper 200B [n = 29]), and a third group that did not use any IUD (n = 33) served as control. Milk samples were collected at 10 weeks postpartum before insertion and 6 weeks after insertion of the devices from 21 women in the first study group, 22 in the second study group and 20 women in the control group. Milk copper concentrations ranged between 0.25 and 0.31 mcg/gram of milk in the various groups before and after insertion. No statistically significant difference in milk copper levels were found before and after 6 weeks in the IUD groups and between the copper IUD groups and in women who did not receive a copper IUD.[ 3 ] Infant Levels. Relevant published information was not found as of the revision date.

Alternatives LactMed lists

• Etonogestrel
• Oral Levonorgestrel
• Intrauterine Levonorgestrel
• Levonorgestrel Implant