M2 medium

With HEPES, without penicillin and streptomycin, liquid, sterile-filtered, suitable for mouse embryo cell culture

MDL number:

Quality Level





storage condition

protect from light


cell culture | embryo: suitable


endotoxin, tested


phenol red: 0.0106 g/L
sodium pyruvate: 0.0363 g/L
HEPES: 5.42726 g/L
glucose: 1.0 g/L (Dextro)
NaHCO3: 0.35 g/L

shipped in


storage temp.


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Recommended for manipulation of mouse embryos at ambient temperature. M2 and M16 Medium are common media for in vitro culture of preimplantation stage embryos. It is a modified Krebs-Ringer bicarbonate solution, which is very similar to Whitten′s Medium. M16 contains pyruvate and lactate as energy sources since preimplantation embryos do not utilize glucose efficiently.

M2 Medium is a further modification of M16 that substitutes HEPES buffer in place of some of the bicarbonate. M2 is used for collecting and handling embryos for prolonged periods outside a CO2 incubator.


Presence of particulates in solution will not affect product′s performance.


Supplement with 0.06 g/L potassium penicillin-G and 0.05 g/L streptomycin sulfate.

Analysis Note

This product is tested for its ability to support the development of one-cell mouse embryos to expanded blastocysts. Minimum requirement is 80% development to blastocyst.


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Maryse Lessard et al.
Scientific reports, 9(1), 13829-13829 (2019-09-27)
The paternal environment is thought to influence sperm quality and future progeny may also be impacted. We hypothesized that prenatal exposure to environmentally-relevant contaminants impairs male reproduction, altering embryo gene expression over multiple generations. Folic acid (FA) can improve sperm...
Hongzheng Sun et al.
Biology of reproduction, 100(3), 601-617 (2018-09-29)
Methionine adenosyltransferase II (MAT2A) is essential to the synthesis of S-adenosylmethionine, a major methyl donor, from L-methionine and ATP. Upon fertilization, zygotic genome activation (ZGA) marks the period that transforms the genome from transcriptional quiescence to robust transcriptional activity. During...
Yi-Wen Xu et al.
Journal of cell science, 130(19), 3297-3307 (2017-08-19)
Precise regulation of DNA replication and genome integrity is crucial for gametogenesis and early embryogenesis. Cullin ring-finger ubiquitin ligase 4 (CRL4) has multiple functions in the maintenance of germ cell survival, oocyte meiotic maturation, and maternal-zygotic transition in mammals. DDB1-cullin-4-associated...
Jiangwei Lin et al.
Scientific reports, 6, 39457-39457 (2016-12-20)
Various types of stem cell lines have been derived from preimplantation or postimplantation mouse embryos: embryonic stem cell lines, epiblast stem cell lines, and trophoblast stem cell lines. It is not known if extraembryonic endoderm stem (XEN) cell lines can...
Tao Fu et al.
FEBS letters, 593(15), 2040-2050 (2019-06-04)
Oncostatin M (OSM) is a member of the interleukin-6 (IL-6) family, which functions in embryo implantation and decidualization. The expression, function and regulation of Osm in mouse uteri during early pregnancy remain unknown. We show that Osm is mainly expressed...
Mouse embryo media and embryo validated reagents for transgenic mouse embryo culture
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