Is it appropriate to prescribe emergency contraception for future use when the patient's last menstrual period occurred within the past 14 days?

Yes, it is appropriate to prescribe emergency contraception for advance use when the last menstrual period occurred within the past 14 days.

The CDC explicitly supports advance provision of emergency contraceptive pills, and this practice is safe and recommended regardless of menstrual cycle timing 1, 2.

Rationale for Advance Provision

The evidence strongly supports providing emergency contraception (EC) in advance so that it will be available when needed and can be taken as soon as possible after unprotected sexual intercourse 2. This approach is particularly important because:

• Efficacy is time-dependent: ECPs are most effective when taken as soon as possible within 5 days of unprotected intercourse 2
• Access barriers exist: Women may face delays in obtaining EC when they need it urgently
• No safety concerns: A systematic review of 17 studies found that advance provision of ECPs is safe and does not negatively impact regular contraceptive use or increase STD rates 2

Key Clinical Considerations

Timing Within the Menstrual Cycle

When the LMP is within the last 14 days, the patient is likely in the follicular phase or approaching ovulation. This is actually an ideal time to provide advance EC because:

• The patient is not currently pregnant (reasonably certain based on recent menstruation)
• She may be approaching her fertile window (days 8-19 of the cycle) 2
• Having EC on hand ensures immediate access if needed during the upcoming fertile period

Available Options to Prescribe

You should provide or prescribe 2:

1. Levonorgestrel 1.5 mg (single dose) - available over-the-counter but prescription ensures no cost barriers
2. Ulipristal acetate 30 mg (single dose) - requires prescription; more effective than levonorgestrel 3-5 days after intercourse and may be more effective in obese women 2

Patient Counseling Points

When providing advance EC, counsel the patient that 2, 3:

• ECPs should be taken as soon as possible within 5 days of unprotected intercourse
• Ulipristal acetate is more effective than levonorgestrel between 72-120 hours after intercourse
• After taking ulipristal acetate, she should wait 5 days before starting or resuming hormonal contraception and use barrier methods for 14 days 3
• After taking levonorgestrel, she can start hormonal contraception immediately but needs barrier methods for 7 days 2, 3
• A pregnancy test is needed if withdrawal bleeding doesn't occur within 3 weeks 2, 3
• EC does not protect against STDs

Common Pitfalls to Avoid

Do not refuse advance provision based on:

• Current menstrual cycle timing - this is irrelevant to advance provision
• Concerns about "encouraging risky behavior" - evidence shows advance provision does not increase unprotected intercourse or decrease regular contraceptive use 2
• Uncertainty about when the patient might need it - that's precisely why advance provision is valuable

Do ensure the patient understands:

• EC is for emergency use, not regular contraception
• She should establish or continue regular contraception for ongoing pregnancy prevention
• The importance of taking EC as soon as possible after unprotected intercourse for maximum effectiveness

The evidence demonstrates that while advance provision increases EC use by 2-7 times, it does not reduce unintended pregnancy rates at the population level 2. However, this does not negate its value for individual women who need it, and the lack of population-level effect likely reflects access and timing issues rather than problems with the intervention itself.