Safe days are days in your menstrual cycle when the probability of getting pregnant is lower. This is typically the days immediately after your period ends and the days just before your next period begins. During these days, you are furthest from ovulation. However, no day is 100% safe — sperm can survive for several days inside the body.

The most unsafe (fertile) days are the 5 days before ovulation and ovulation day itself — typically days 10-17 of a 28-day cycle. Ovulation day carries the highest pregnancy probability. The 2-3 days just before ovulation are also very risky because sperm can survive long enough to fertilize the egg when it is released.

The rhythm or calendar method is considered a less reliable form of natural family planning, with failure rates of 9-25% with typical use. It works best as part of Fertility Awareness Methods (FAM) that combine calendar tracking with daily basal body temperature recording and cervical mucus observation. For reliable contraception, consult a doctor about appropriate methods for your needs.

Irregular cycles significantly reduce the reliability of calendar-based safe day calculations. If your cycle varies by more than a few days from month to month, safe day predictions become much less accurate because ovulation timing shifts unpredictably. Women with irregular cycles should not rely on this method and should consult a healthcare provider for appropriate family planning guidance.

The most common method is Naegele’s Rule: add 280 days (40 weeks) to the first day of your last menstrual period. This assumes a 28-day cycle with ovulation on day 14. If your cycle is longer or shorter, the calculator adjusts accordingly. Ultrasound measurements in early pregnancy are often considered the most accurate way to date a pregnancy.

Only about 5% of babies are born on their exact estimated due date. About 80% of babies are born within two weeks either side of the EDD. The due date is a best estimate — doctors consider 37-42 weeks as the normal full-term range. Early ultrasound (6-10 weeks) provides the most accurate dating.

First trimester (weeks 1-12): Major organ development. Highest miscarriage risk. Morning sickness common.
Second trimester (weeks 13-26): “Honeymoon phase” — energy returns, belly grows, baby movements felt.
Third trimester (weeks 27-40+): Rapid baby growth, increasing discomfort, preparation for birth.

Fetal viability refers to the gestational age at which a baby has a reasonable chance of survival outside the womb with medical support. This is generally considered to be around 22-24 weeks. Survival rates improve significantly with each additional week of gestation beyond 24 weeks. This is a medical threshold, not a legal or ethical definition.

Pregnancy is dated from the first day of your last menstrual period (LMP), not from conception. This means you are considered “2 weeks pregnant” at the time of conception (since ovulation occurs around day 14 of a 28-day cycle). A full-term pregnancy is 40 weeks (280 days) from LMP — though the actual fertilization happens around week 2.

Most healthcare providers recommend your first prenatal visit between 8-10 weeks of pregnancy. However, if you have had previous miscarriages, fertility treatments, chronic conditions, or any concerning symptoms, you should contact your provider as soon as pregnancy is confirmed — regardless of how early it is.

Weeks 1-12 (First trimester): All major organs begin forming. Critical period for fetal development. Most pregnancy symptoms are strongest.
Weeks 13-26 (Second trimester): Baby grows rapidly, starts moving. Most women feel their best during this period.
Weeks 27-40 (Third trimester): Baby puts on weight, lungs mature, positions for birth. Increasing physical discomfort is normal.

A properly fitting condom is safer and more effective. A condom that is too tight is uncomfortable, more likely to break, and harder to put on. A condom that is too loose may slip off during use, reducing protection against pregnancy and STIs. Studies show that condom fit and comfort are among the top reasons people don’t use condoms consistently — finding the right size helps encourage consistent, correct use.

Nominal width is the width of a condom when laid flat — the primary measurement used to categorize condom sizes. It is approximately half the circumference of an erect penis when the condom is stretched to fit. Most standard condoms have a nominal width of 52-56mm. Snug condoms are typically 49-52mm; large/XL are 56-60mm; XXL are 60mm+.

When used correctly and consistently, condoms are 98% effective at preventing pregnancy. With typical use (accounting for human error), effectiveness is around 87%. Condoms are the only contraceptive method that also significantly reduces transmission of most STIs including HIV, gonorrhea, chlamydia, and others. Using condoms alongside another contraceptive method (like the pill) provides maximum protection.

With latex and polyisoprene condoms, use water-based or silicone-based lubricants only. Oil-based lubricants (petroleum jelly, coconut oil, body lotion) can degrade latex and cause the condom to break. Polyurethane condoms are compatible with all lubricants. Adding lubricant to the inside tip of the condom (a drop) and the outside also increases sensation and reduces breakage risk.

NoFap is a self-improvement movement and community (originating on Reddit’s r/NoFap community, now with over 1 million members) focused on abstaining from pornography and/or masturbation. Participants report benefits including improved focus, energy, confidence, better relationships, and reduced anxiety. The name comes from internet slang — “fapping” being slang for male masturbation. The movement is not anti-sex; it focuses on breaking compulsive pornography use and excessive masturbation habits.

Commonly reported benefits include: increased energy and motivation, improved confidence and social skills, reduced brain fog and better mental clarity, better sleep quality, improved gym performance, stronger erections (reduction of porn-induced erectile dysfunction / PIED), better emotional regulation, more genuine interest in real-life relationships, and a greater sense of purpose and self-control. Note: research on this topic is still emerging; many benefits are self-reported by community members.

The 90-day reboot is the most widely recognized NoFap goal. The theory, based partly on neuroscience research on dopamine and reward circuits, is that 90 days is sufficient time for the brain to significantly recover from pornography-related dopamine dysregulation — recalibrating reward sensitivity and reducing compulsive urges. Many community members report their most significant improvements appearing around the 30-60 day mark, with substantial changes by 90 days.

No — a relapse is a common part of the process for many people, not a failure. The NoFap community emphasizes progress over perfection. After a relapse, the most important step is to restart your streak immediately. Over time, most people find their streak lengths increase and their urges become more manageable. Think of it like quitting smoking: most people need multiple attempts before achieving long-term success.

PMO stands for Porn, Masturbation, Orgasm. “No PMO” refers to complete abstinence from all three. Some participants choose different levels: No Porn only (Easy Mode), No Porn + No Masturbation (Normal Mode), or No PMO at all including partnered sex (Hard Mode). Most medical professionals and sex therapists focus on reducing compulsive pornography use specifically, rather than masturbation itself, which is considered a normal healthy behavior when not compulsive.