Breastfeeding Birth Control
vs
Diaphragm

A side-by-side comparison of two birth control methods — efficacy, cost, how they work, and who shouldn't use them.

Side-by-side comparison

Method
Breastfeeding Birth Control

Breastfeeding Birth Control

A natural postpartum method (lactational amenorrhea method, LAM) that relies on exclusive breastfeeding to suppress ovulation, effective for up to 6 months.
Diaphragm

Diaphragm

A reusable silicone dome that covers the cervix to block sperm, used with spermicide each time you have sex.
Efficacy98% typical use

Moderately effective: over 90 out of 100 people successfully prevent pregnancy per year.

83% typical use

Least effective: under 90 out of 100 people successfully prevent pregnancy per year.

Cost$0–$300

Insurance: Varies

$80–$200

Insurance: Usually

DurationUp to 6 months postpartumReusable for 1-2 years (replace every 1-2 years or sooner if damaged)
ReversibilityReversibleReversible
STI ProtectionNoNo
How it works

Exclusive breastfeeding suppresses the hormones that trigger ovulation. High prolactin from frequent nursing keeps estrogen and progesterone low, preventing the return of menstrual cycles.

A reusable silicone dome covers the cervix to block sperm from entering the uterus. Used with spermicide for added effectiveness.

PrescriptionOTC No prescription / OTCRequired Prescription required
Available ProductsNo branded products yet2 products
Side effectsNone reported
  • Increased risk of urinary tract infection
  • Vaginal irritation from spermicide
  • Discomfort if not fitted correctly
Who shouldn't use this
  • Baby over 6 months old
  • Periods have returned
  • Not exclusively or nearly exclusively breastfeeding
  • Use of supplemental formula or solid foods
  • Uterine or cervical anomaly preventing fit
  • Sensitivity to silicone or spermicide
  • Inability to insert or remove reliably