K. E. Tucker’s research while affiliated with Reinier de Graaf Groep and other places

... Culture media pass the test if at least 70 -80% of the embryos develop to the blastocyst stage. The test is not standardized as every company uses different mouse strains which differ in their developmental potential (Tucker and Jansen, 2002). In addition, the follow-up of the concepti after implantation with respect to, for instance, health status has not been performed yet. ...

Reference:

Effects of embryo culture media do not persist after implantation: A histological study in mice

... Based on all of the above observations, consensus has been reached: embryos with MN blastomeres are highly unsuitable for replacement and should be excluded for transferring unless non-MN embryos are available [7, 8, 12]. Reports on MN cells that evolved to mono-nucleated blas- tomeres [13, 25, 26] , eventually giving rise to normal preg- nancies [2, 3, 7, 9, 27], led us to investigate the outcome of our transferred MN embryos, specifically those that " changed " from MN to mono-nucleated blastomeres (those, we named " Corrected Embryos " ). ...

Reference:

Insights on blastomere nuclearity

... Activin, which is also an ovarian growth factor (Hull and Harvey, 2001), inhibits granulosa cell apoptosis in a dose dependent manner and the expression of activin subunits increases with the size of the follicle (Svanberg, 1999), which could explain the results for pronuclei development at the follicular stage in the current study. Additionally, it has been demonstrated that follicular blood flow and intrafollicular oxygenation are positively related to the ability of the oocyte-embryo to develop, compared to those from low vascularization (Tucker and Jansen, 2002). Because of the characteristic lipid content in dog oocytes, it was not possible to assess embryo quality before staining. ...

Reference:

Embryonic Development of In Vitro Matured and In Vitro Fertilized Dog Oocytes

... Studies involving female subjects employed designs such as cross-sectional (22,23), prospective cohort (10), case-control study (24)(25)(26), case-control prospective study (7,27), and prospective study (28)(29)(30). The total number of participants recruited was 1102. ...

Reference:

Infertility and cortisol: a systematic review