Like the pregnancy wheel your fertility specialist , OB or midwife uses, this page will help calculate when your baby is or will be due. If you conceive through IVF of any kind, you may use either the retrieval or transfer date to calculate this. Please note that your due date is only an estimate of when your child will be born. Most babies are not born on their due dates, and your doctor or midwife may change the due date based on ultrasounds.
However, you can figure out your due date yourself, if you want. The average gestation for a singleton pregnancy is generally considered to be days or 40 weeks from your last menstrual period. However, due dates are more complicated and less certain than that. Also, due dates after infertility or after IVF can be a little different, too. Only 5 out of babies are born on their assigned due date. Studies have found that ovulation can occur a few days off from what a positive ovulation test or BBT chart indicates. Also, implantation of the embryo also varies.
Metrics details. Displacement of the window of implantation WOI has been proposed as an important factor contributing to repeated implantation failure RIF. However, the use of histologic endometrial dating as a diagnostic tool of endometrial receptivity has been questioned. This study is a prospective intervention trial that enrolled infertile patients from July to December Histologic endometrial dating of RIF patients in natural cycles may be a biomarker for a receptive endometrium in diagnosing WOI displacement.
The process of embryo implantation is carried out during the receptive stage of the endometrium in the midluteal phase of the menstrual cycle, known as window of implantation WOI. It has been assumed that the WOI is not a constant variable in all women and the determination of its displacement is of crucial importance, especially for patients with recurrent implantation failure RIF. Furthermore, in rare cases it could have different duration and position in the menstrual cycle even in the same woman but during different periods. Here, we report a year-old woman with RIF, who was previously classified as idiopathic but has now been diagnosed as having a variable WOI. This interpretation was done after the performance of immunohistochemical and histomorphological analyses of endometrial biopsies taken in the midluteal phase during three sequential menstrual cycles.