In this article we question everything related to the days of gestation in pregnant by via in vitro (IVF). We will address when the arrival of a new member of the family is expected and for this we will give the keys to calculate the delivery date after IVF.
After this method of conception, many mothers-to-be want to ask about when their baby's due date will be. Really each pregnancy has a different way of developingWhether naturally or artificially, there is no specific date to calculate the day of delivery, but an approximation.
How to calculate the delivery date in an IVF?
Calculating the days of the delivery date in IVF has an easy answer. The In vitro fertilization tIt has its manual creation, generally carried out in a clinic. It takes place a follicular puncture to obtain oocytes that have matured. The specialists in said fertilization proceed to unite eggs with sperm.
The connection can be made by means of a Conventional IVF or sperm microinjection (ICSI). From this moment on, the embryo or embryos will be formed and we will wait to observe them between 2 to 6 days in an incubator. If its evolution is correct, it will be implanted or frozen. If said fertilization is carried out, it will be counted from day 0 of the embryo.
How are the weeks of pregnancy calculated in IVF?
There are some methods that can be used on the web It is managed through some free applications or tools available on the internet. Otherwise, it will be necessary to calculate the day of union of the ovum with the spermatozoon and is calculated on day 14 of the menstrual cycle. However, the weeks of pregnancy can be calculated as follows:
- A calculation, adding the 3 days: before the embryo transfer is calculated 17 days before, on the last day of the period. From the calculated day, the days of gestation are counted and it consists of adding 263 days to calculate the day of delivery.
- In in vitro fertilization with own eggs (with or without ICSI) the date of delivery after IVF can be calculated. You have to add 266 days (or 38 weeks) from the date of the egg retrieval.
- In vitro fertilization with donor eggs (with or without ICSI). This method consists of an in vitro fertilization (IVF) treatment where the eggs are donated. Here the date of the follicular puncture is used and 38 weeks, about 266 days, must be added from here.
- During pregnancy and during routine ultrasound visits, the date of delivery can also be calculated depending on the size of the embryo or fetus. There are some measurement tables when the echoes are performed, and depending on what the future baby measures, the delivery date can be resolved.
Calculations in IVF procedures
A spontaneous and natural gestation is calculated from the day of the start of the last period. When a woman finds out that she is pregnant with a week's delay in her period, She is already formalizing four weeks of pregnancy. This is due to the fact that her ovulation occurred in the first 15 days after the previous period, and it is from these days when she could have become pregnant, hence this prognosis is formalized.
However for people with irregular periods, no precise data can be given, since ovulation could have occurred in the week before or after the days that it has been possible to "ovulate" (in the 15 days after the last period). The probable date of delivery (FPP) is always calculated between 38 and 40 weeks after the day of the last period.
- In the in vitro fertilization treatment you have to take as day when ovarian puncture occurs and date of possible ovulation. Two weeks before will be recorded as the date of the last menstrual period.
- In the egg donation treatment, It will be taken as the date when the ovaries of the person who has donated have been punctured, as the second week of gestation.
- In artificial insemination, the last menstrual period will be taken as the date and in the treatments of devitrified embryos the date of the embryo transfer will be taken into account, but also the days of the embryo's life.