If I have unprotected intercourse after only five days of starting Slynd (drospirenone/ethinyl estradiol), what is the risk of pregnancy?

Risk of Pregnancy After 5 Days of Slynd

After only 5 days of taking Slynd, you are NOT adequately protected against pregnancy and should consider emergency contraception if you had unprotected sex.

Why You're at Risk

Slynd is a progestin-only pill (POP) containing drospirenone that requires 7 consecutive days of correct use to achieve full contraceptive protection when starting the medication 1. At only 5 days, you have not reached the threshold for reliable contraceptive effectiveness.

The Science Behind the Timeline

• Progestin-only pills work differently than combined pills: They primarily thicken cervical mucus to prevent sperm penetration and may suppress ovulation in some cycles 2
• Cervical mucus changes require time: Studies suggest approximately 48 hours of POP use is needed to achieve contraceptive effects on cervical mucus, but 7 days is the established safety standard for full protection 2
• Peak effectiveness is not immediate: Serum steroid levels reach peak about 2 hours after administration but drop near baseline by 24 hours, making consistent daily use critical 2

What You Should Do Now

Immediate Action: Emergency Contraception

You should strongly consider emergency contraception given that you had unprotected intercourse before completing 7 days of Slynd 3. Your options include:

1. Ulipristal acetate (Ella) - 30 mg single dose

   • Most effective option, especially if taken within 120 hours (5 days) 2
   • More effective than levonorgestrel, particularly after 72 hours 2

2. Levonorgestrel (Plan B) - 1.5 mg single dose

   • Should be taken as soon as possible within 5 days 2
   • Effectiveness decreases after 72 hours 2

3. Copper IUD

   • Can be inserted within 5 days of unprotected intercourse 2
   • Most effective emergency contraception method 2

Continue Taking Slynd

• Keep taking your daily Slynd pill at the same time each day 1
• Use backup contraception (condoms) until you have completed 7 consecutive days of correct pill use 3
• After 7 days of consistent use, Slynd will provide adequate contraceptive protection

Important Timing Considerations

The sooner you take emergency contraception, the better it works 2. Don't delay:

• Emergency contraceptive pills should be taken as soon as possible within 5 days of unprotected intercourse 2
• Pregnancy rates increase when emergency contraception is delayed beyond 3 days 2

If You Take Ulipristal Acetate (Ella)

There's a specific interaction to know about:

• Wait 5 days after taking Ella before resuming Slynd 4
• The antiprogestin properties of ulipristal may interfere with progestin-only pills if taken simultaneously
• Use barrier methods (condoms) during this 5-day waiting period
• After resuming Slynd, use backup contraception for another 7 days 4

If You Take Levonorgestrel

• You can continue taking Slynd immediately without interruption 4
• Continue using backup contraception until you've completed 7 consecutive days of Slynd 3

Quantifying Your Risk

Without emergency contraception, your pregnancy risk depends on:

• Timing in your menstrual cycle: Risk is highest during the fertile window (typically days 8-19 of a regular cycle) 2
• Your natural fertility: The 6-day fertile window varies greatly, even among women with regular cycles 2
• Slynd's partial protection: While 5 days provides some contraceptive effect, it's insufficient for reliable protection

With typical use, Slynd has a Pearl Index of approximately 4 pregnancies per 100 women per year when used correctly 1. However, this assumes consistent use after the initial 7-day period.

Common Pitfalls to Avoid

1. Don't assume partial protection is adequate: The 7-day rule exists for a reason—shorter durations don't provide reliable contraception
2. Don't skip emergency contraception thinking "it's probably fine": The consequences of unintended pregnancy far outweigh the minor inconvenience and cost of emergency contraception
3. Don't stop taking Slynd: Continue your pills daily while using backup methods until fully protected

When to Take a Pregnancy Test

• If you don't get a withdrawal bleed within 3 weeks after taking emergency contraception, take a pregnancy test 4
• If you miss 2 consecutive periods while on Slynd, take a pregnancy test 1