Whether you’ve used donor eggs, donor embryos or have undergone a frozen embryo transfer (FET), our fantastic pregnancy calculator is here to provide you with all the information you need.
Last menstrual period date:
We are aware of how it feels to become a parent, and your anticipation of knowing when your little one makes their grand entrance into the world! Plus, knowing your due date is important for your healthcare providers to keep tabs on your baby’s growth and development. They can also keep an eye out for any potential risks or complications that may arise during your pregnancy.
On an average, pregnancy lasts for about 40 weeks or 280 days. When it comes to calculating the due date for natural conception, healthcare providers often rely on the first day of the last menstrual period rather than the date of conception.
| Type of Transfer | Formula for Calculation |
| IVF with own eggs | Transfer date + 38 weeks |
| IVF with fresh donor egg cycle | Transfer date + 38 weeks |
| Fresh donor embryo cycle | Transfer date + 38 weeks |
| 3 day FET | Transfer date + 38 weeks – 3 days (for embryos) |
| 5 day FET | Transfer date + 38 weeks – 5 days (for blastocysts) |
It is important to keep in mind that even with IVF, due dates are still only estimates. Factors such as the growth rate of the embryo, changes in implantation time, and individual differences in pregnancy length can all affect the actual date of delivery.
Additionally, Additionally, if you have undergone a frozen embryo transfer (FET), the estimated due date with IVF Due Date Calculator may be less accurate due to the fact that the embryos may have been frozen for an extended period of time before transfer. In these cases, your healthcare provider may adjust your due date based on additional ultrasound measurements or other indicators of gestational age.
If you have any questions or feedback about our IVF due date calculator, please feel free to reach out to us. We are happy to assist you in your journey to happy parenthood!
At week 2, ovulation might begin. If a sperm fertilizes an egg during ovulation, you will get pregnant.
At week 3, and a week after fertilization – your developing baby is now a small ball composed of numerous rapidly multiplying cells.
At week 4, the baby is in the embryonic stage and is composed of two layers. Additionally, the placenta is in its early stages of formation.
At week 5, your developing embryo is experiencing rapid growth. During this time, you may start to experience discomforts such as breast tenderness and fatigue.
At week 6, your baby’s heart has already begun to beat. At this stage, you may also be experiencing pregnancy discomforts such as morning sickness and sore breasts.
At week 7, your baby is forming facial features such as eyes, nose, mouth, and ears. You might need to pee frequently.
At week 8, your baby’s hands and feet are developing with tiny webbed fingers and toes. You might be experiencing nausea and fatigue, while also making choices regarding prenatal tests.
At week 9, your baby is taking on a more human-like appearance. It’s common to experience morning sickness and mood swings.
At week 10, the most crucial stage of your baby’s development is completed! You might be considering getting some maternity clothing or maybe some new bras.
At week 11, your baby is actively kicking and stretching, although you may not be able to feel it yet.
At week 12, your baby is able to curl their tiny toes and make sucking movements. You might be experiencing heartburn
At week 13, your baby has developed little fingerprints and has now grown to 3 inches long. You’re about to finish your first trimester.
At week 14, your baby would start making expressions with their tiny features. You are more energetic and less nauseated at this stage.
At week 15, your baby is developing mobile joints and developing taste buds. Experiencing a stuffy nose? It’s a side effect of pregnancy.
At week 16, you might be experiencing reduced nausea and fewer mood swings. At this stage, your baby is about to embark on a significant growth spurt.
At week 17, your little one’s skeletal structure is transforming from soft cartilage to solid bone, while the umbilical cord is becoming more robust and thick.
At 18 weeks, an ultrasound can reveal your baby’s developed genitals. Feeling more hungry than usual? It’s normal to have an increase in appetite at this stage.
At week 19, Your baby’s scalp is sprouting hair. If your side aches, you are experiencing round ligament pain.
At week 20, you’ve reached the halfway point of your pregnancy – Congrats! The taste buds of your baby are now functioning.
At week 21, Your baby’s early flutters are turning into kicks, so you can feel your baby moves. Interesting fact: Your baby now has eyebrows.
At week 22, your heartbeat may be heard by your baby, and your growing belly might be attracting more hand touches.
At week 23, your baby has a developed sense of movement, and you are experiencing swelling in your ankles and feet.
At week 24, your baby is about to change from long and lean, and your uterus is now the size of a soccer ball.
At week 25, your baby is growing more hair and adding baby fat, while your hair may look extra shiny as well.
At week 26, your baby is practicing breathing by inhaling and exhaling a little amount of amniotic fluid. It’s good practice for breathing.
At week 27, your baby is opening and closing their eyes, sucking their fingers, and may experience hiccups.
At week 28, your baby’s eyes are able to see light filtering in through your womb, and you’re starting your last trimester.
At week 29, your baby’s lungs and muscles are maturing, and its head is growing to make room for its developing brain.
At week 30, your baby now has almost 3 pounds weight, and you are experiencing clumsiness, mood swings, and fatigue.
At week 31, you might be experiencing Braxton Hicks contractions and have difficulty sleeping due to your baby’s powerful kicks.
At week 32, your baby is gaining weight while your uterus is expanding, which may result in symptoms such as heartburn and shortness of breath.
At week 33, your baby weighs a little more than 4 pounds, and you may be having trouble getting comfy in bed.
At week 34, your baby’s central nervous system and lungs are maturing, and you may experience dizziness and fatigue.
At week 35, your baby is gaining weight, but movement may be limited due to a lack of space in the womb. You might be still feeling some movements.
At week 36, your baby is gaining about an ounce a day, and you may feel them “drop” down into your pelvis soon.
At week 37, your baby’s lungs and brain continue to mature. And you might be experiencing increased vaginal discharge and occasional contractions.
At week 38, your baby has a strong grip, and you’ll soon be able to see it for yourself! Be mindful of any indications of preeclampsia.
At week 39, your baby has reached full term and is eagerly awaiting their arrival into the world. Remember to contact your healthcare provider right away if your water breaks.
At week 40, your baby is approximately the size of a small pumpkin. It’s perfectly normal if you’re still pregnant at this point, as many pregnancies go past their due dates.
At week 41, you can expect to go into labour or be induced shortly. It’s normal for your baby to remain active right up until delivery.
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