In vitro fertilization in women age 40 and older: The impact of assisted hatching

William B. Schoolcraft, Terry Schlenker, Georgeanna S. Jones, Howard W. Jones

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


Purpose: To assess the impact of assisted hatching on in vitro fertilization (IVF) outcome in women age 40 and older. Methods: A retrospective analysis was performed to compare 28 cycles of IVF without assisted hatching to 38 cycles of IVF with assisted hatching. All patients in both groups were age 40 or older and the mean age was similar. Results: The delivery rate per oocyte retrieval was significantly higher in the assisted hatching group (18/38; 48%) compared to the nonhatched controls (3/28; 11%, P=0.0003). The implantation rate of hatched embryos (40/175; 22%) was clearly enhanced, compared to the non-hatched embryos (7/126; 6%, P<0.001). The fertilization rate, number of oocytes and the number of embryos per patient were comparable in the two groups. Conclusions: Assisted hatching dramatically improves embryonic implantation and term pregnancy rates in women age 40 and older undergoing IVF.

Original languageEnglish (US)
Pages (from-to)581-584
Number of pages4
JournalJournal of Assisted Reproduction and Genetics
Issue number9
StatePublished - Oct 1995
Externally publishedYes


  • age 40 and older
  • assisted hatching
  • implantation rate
  • in vitro fertilization
  • micromanipulation
  • zona pellucida

ASJC Scopus subject areas

  • Reproductive Medicine
  • Genetics
  • Obstetrics and Gynecology
  • Developmental Biology
  • Genetics(clinical)


Dive into the research topics of 'In vitro fertilization in women age 40 and older: The impact of assisted hatching'. Together they form a unique fingerprint.

Cite this