Editing In vitro fertilisation (section)

====Pregnancy rate====
Pregnancy rate may be defined in various ways. In the United States, SART and the [[Centers for Disease Control]] (and appearing in the table in the Success Rates section above) include statistics on positive pregnancy test and clinical pregnancy rate.

The 2019 summary compiled by the SART the following data for non-donor eggs (first embryo transfer) in the United States:<ref name="2019 Clinic Summary Report">{{cite web|url=https://www.sartcorsonline.com/rptCSR_PublicMultYear.aspx?ClinicPKID=0|title=2019 Clinic Summary Report|work=Society for Assisted Reproductive Technology|url-status=dead|archive-url=https://web.archive.org/web/20200204120048/https://www.sartcorsonline.com/rptCSR_PublicMultYear.aspx?ClinicPKID=0|archive-date=4 February 2020|access-date=21 April 2022}}</ref>

{| class="wikitable"
|-
! !! <35 !! 35-37 !! 38-40 !! 41–42
!>42
|-
| Positive pregnancy test rate (%)|| 55.1 || 44.8 || 32.9 || 19.1
|8.5
|-
| Clinical pregnancy rate (%)|| 47.5 || 38.3 || 27.5 || 15.5
|6.3
|}

In 2006, Canadian clinics reported an average pregnancy rate of 35%.<ref name=canadians>{{cite web | vauthors = Branswell H | date = 15 December 2008 | url = http://www.theglobeandmail.com/servlet/story/RTGAM.20081215.wivf1215/BNStory/National/?page=rss&id=RTGAM.20081215.wivf1215 | title = Success rate climbs for in vitro fertilisation | work = The Canadian Press | archive-url = https://web.archive.org/web/20090318062752/http://www.theglobeandmail.com/servlet/story/RTGAM.20081215.wivf1215/BNStory/National/?page=rss&id=RTGAM.20081215.wivf1215 | archive-date = 18 March 2009 }}</ref> A French study estimated that 66% of patients starting IVF treatment finally succeed in having a child (40% during the IVF treatment at the centre and 26% after IVF discontinuation). Achievement of having a child after IVF discontinuation was mainly due to [[adoption]] (46%) or [[spontaneous pregnancy]] (42%).<ref>{{cite journal | vauthors = de La Rochebrochard E, Quelen C, Peikrishvili R, Guibert J, Bouyer J | title = Long-term outcome of parenthood project during in vitro fertilization and after discontinuation of unsuccessful in vitro fertilization | journal = Fertility and Sterility | volume = 92 | issue = 1 | pages = 149–156 | date = July 2009 | pmid = 18706550 | doi = 10.1016/j.fertnstert.2008.05.067 | s2cid = 207633738 | doi-access = free }}</ref>