How do I calculate my due date from my last menstrual period?

Your estimated due date (EDD) is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This assumes a 28-day cycle with ovulation on day 14. For example, if your LMP was January 1, your due date would be October 8. Only about 5% of babies are born on their exact due date; most arrive within 2 weeks before or after. Ultrasound dating in the first trimester is most accurate, within 5-7 days.

How much weight should I gain during pregnancy?

Recommended weight gain based on pre-pregnancy BMI (per ACOG guidelines): Underweight (BMI <18.5) - gain 28-40 lbs; Normal weight (BMI 18.5-24.9) - gain 25-35 lbs; Overweight (BMI 25-29.9) - gain 15-25 lbs; Obese (BMI 30+) - gain 11-20 lbs. For twins, add 10-15 lbs to these ranges. First trimester: 1-4 lbs total; Second and third trimesters: approximately 1 lb per week for normal BMI. Weight gain distribution: baby 7.5 lbs, placenta 1.5 lbs, amniotic fluid 2 lbs, blood volume 4 lbs, breast tissue 2 lbs.

When is my most fertile time to conceive?

Your fertile window is approximately 6 days: 5 days before ovulation and the day of ovulation itself. Peak fertility is 1-2 days before ovulation. For a 28-day cycle, ovulation typically occurs on day 14. Signs of ovulation include: egg-white cervical mucus, slight temperature rise (0.4-1°F), mild cramping (mittelschmerz), and increased libido. Ovulation predictor kits detect the LH surge 24-36 hours before ovulation. Sperm can survive 3-5 days; eggs are viable for 12-24 hours.

What do AMH levels mean for fertility and IVF success?

Anti-Mullerian Hormone (AMH) indicates ovarian reserve. Normal ranges by age: under 30 - 2.5-6.8 ng/mL; 30-35 - 1.5-4.0 ng/mL; 35-40 - 0.5-2.5 ng/mL; over 40 - 0.1-1.0 ng/mL. Low AMH ( 5.0) may indicate PCOS. For IVF, AMH helps predict response to stimulation medications. Higher AMH generally means more eggs retrieved, but egg quality (determined by age) matters more for success rates.

What is a good embryo grade for IVF and what do the numbers mean?

Day 5 blastocyst grading uses three components: Expansion (1-6, with 4+ being expanded), Inner Cell Mass quality (A-C, A is best), and Trophectoderm quality (A-C, A is best). A '4AA' is considered excellent. Day 3 embryos are graded on cell number (ideal: 8 cells) and fragmentation (Grade 1-4, with 1 being <10% fragmentation). Success rates by grade: high-quality blastocysts (4AA, 4AB) have 50-60% implantation rates; good quality (4BB, 4BC) have 35-45%; lower grades still have 20-30% success rates.

What is a normal follicle count and what does it mean for egg retrieval?

Antral Follicle Count (AFC) measured by ultrasound predicts IVF response: 10-15 follicles is average and suggests normal ovarian reserve; fewer than 6 indicates diminished reserve; more than 20 may indicate PCOS and higher risk of overstimulation. During IVF stimulation, not all follicles yield mature eggs: approximately 80% of follicles >14mm contain mature eggs at retrieval. Of retrieved eggs, typically 70-80% are mature, 70-80% of mature eggs fertilize normally, and 30-50% develop to blastocyst stage.

Pregnancy & Fertility Calculators

Q: When is my most fertile time to conceive?

Your fertile window is approximately 6 days: 5 days before ovulation and the day of ovulation itself. Peak fertility is 1-2 days before ovulation. For a 28-day cycle, ovulation typically occurs on day 14. Signs of ovulation include: egg-white cervical mucus, slight temperature rise (0.4-1°F), mild cramping (mittelschmerz), and increased libido. Ovulation predictor kits detect the LH surge 24-36 hours before ovulation. Sperm can survive 3-5 days; eggs are viable for 12-24 hours.

Q: What do AMH levels mean for fertility and IVF success?

Anti-Mullerian Hormone (AMH) indicates ovarian reserve. Normal ranges by age: under 30 - 2.5-6.8 ng/mL; 30-35 - 1.5-4.0 ng/mL; 35-40 - 0.5-2.5 ng/mL; over 40 - 0.1-1.0 ng/mL. Low AMH ( 5.0) may indicate PCOS. For IVF, AMH helps predict response to stimulation medications. Higher AMH generally means more eggs retrieved, but egg quality (determined by age) matters more for success rates.

Q: What is a good embryo grade for IVF and what do the numbers mean?

Day 5 blastocyst grading uses three components: Expansion (1-6, with 4+ being expanded), Inner Cell Mass quality (A-C, A is best), and Trophectoderm quality (A-C, A is best). A '4AA' is considered excellent. Day 3 embryos are graded on cell number (ideal: 8 cells) and fragmentation (Grade 1-4, with 1 being <10% fragmentation). Success rates by grade: high-quality blastocysts (4AA, 4AB) have 50-60% implantation rates; good quality (4BB, 4BC) have 35-45%; lower grades still have 20-30% success rates.

Q: What is a normal follicle count and what does it mean for egg retrieval?

Antral Follicle Count (AFC) measured by ultrasound predicts IVF response: 10-15 follicles is average and suggests normal ovarian reserve; fewer than 6 indicates diminished reserve; more than 20 may indicate PCOS and higher risk of overstimulation. During IVF stimulation, not all follicles yield mature eggs: approximately 80% of follicles >14mm contain mature eggs at retrieval. Of retrieved eggs, typically 70-80% are mature, 70-80% of mature eggs fertilize normally, and 30-50% develop to blastocyst stage.

Essential tools for planning, tracking, and preparing for your pregnancy journey

Pregnancy Planning Tools

Due Date Calculator

Calculate your estimated due date based on your last menstrual period or conception date

Pregnancy Weight Gain Calculator

Track healthy weight gain throughout your pregnancy based on pre-pregnancy BMI

Ovulation Calculator

Predict your most fertile days to optimize conception timing

IVF & Fertility Tools

Follicle Count Tracker

Track follicle development during IVF stimulation

Egg Retrieval Calculator

Predict mature eggs based on follicle counts

Embryo Grading Interpreter

Understand Day 3 and Day 5 embryo quality grades

AMH Interpreter

Interpret your AMH levels for IVF planning

Start Planning Baby Names

While planning your pregnancy, explore our curated collection of 2,700+ beautiful baby names from 18 world cultures. Filter by origin, meaning, and style.

Browse All Names →Name Combiner Tool

Supporting Your Pregnancy Journey

Our pregnancy calculators are based on medical guidelines and designed to help you understand and track your pregnancy. Remember to always consult with your healthcare provider for personalized medical advice.

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