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2. Gestational age - Wikipedia

   en.wikipedia.org/wiki/Gestational_age

   Gestational age. For actual age of gestation, see Human fertilization § Fertilization age. In obstetrics, gestational age is a measure of the age of a pregnancy taken from the beginning of the woman's last menstrual period (LMP), [1] or the corresponding age of the gestation as estimated by a more accurate method, if available.

3. Estimated date of delivery - Wikipedia

   en.wikipedia.org/wiki/Estimated_date_of_delivery

   Here's the formula to calculate your Estimated Due Date using Naegele's rule : Date of Last Menstrual Period + 7 Days + 9 Calendar Months = Date of Estimated Date of Delivery. Example: LMP = 8 May 2020. +1 year = 8 May 2021. −3 months = 8 February 2021.

4. Pregnancy rate - Wikipedia

   en.wikipedia.org/wiki/Pregnancy_rate

   Pregnancy rate. Pregnancy rate is the success rate for getting pregnant. It is the percentage of all attempts that leads to pregnancy, with attempts generally referring to menstrual cycles where insemination or any artificial equivalent is used, which may be simple artificial insemination (AI) or AI with additional in vitro fertilization (IVF).

5. Pregnancy - Wikipedia

   en.wikipedia.org/wiki/Pregnancy

   A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a stillbirth. Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP), a span known as the gestational age. This is just over nine months. Counting by fertilization age, the length is about 38 weeks.

6. Crown-rump length - Wikipedia

   en.wikipedia.org/wiki/Crown-rump_length

   Crown-rump length. An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length ( CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump).

7. Pearl Index - Wikipedia

   en.wikipedia.org/wiki/Pearl_Index

   Several kinds of information are needed to calculate a Pearl Index for a particular study: the total number of months or cycles of exposure by women in the study; the number of pregnancies; the reason for leaving the study (pregnancy or other reason) the number of children in a single pregnancy (twins or triplets can affect the final number)