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By embryo we mean in the sense of up to the 2nd week postfertilization (beginning of Theiler stage 23), we treat fetus as a separate stage.

"Starts the mouse development sequence, range from embryonic age 0-0.9 dpc (day post coitum). Assumes that fertilization takes place around midnight during a 7pm to 5am dark cycle. Noon of the day on which the vaginal plug is found the embryos are aged 0.5 d.p.c (days post coitum)." [http://php.med.unsw.edu.au/embryology/index.php?title=Mouse_Stages#Timed_Pregnancy "adapted from"]

The different cells derived from cleavage are called blastomeres and form a compact mass called the morula. Cleavage ends with the formation of the blastula.

Embryonic age 1 dpc (day post coitum).

Embryonic age 2 dpc (day post coitum).

The blastula follows the morula and precedes the gastrula in the developmental sequence.

Embryonic age 3 dpc (day post coitum).

Embryonic age 4 dpc (day post coitum).

Embryonic age 4.5 dpc (day post coitum). Refers to human CarnegieStage04.

Embryonic age 5 dpc (day post coitum). Refers to human CarnegieStage05.

Embryonic age 6 dpc (day post coitum). Refers to human CarnegieStage05.

Embryonic age 6.5 dpc (day post coitum).

Embryonic age 7 dpc (day post coitum), (range 6.5-7.5 dpc). Refers to human CarnegieStage08.

This term was obsoleted as it was the only child associated to MmusDv:0000017., This stage starts the emergence of the central nervous system at embryonic age 7.5 dpc (day post coitum).

This stage starts the emergence of the central nervous system at embryonic age 7.5 dpc (day post coitum).

Embryonic age 8 dpc (day post coitum). Refers to human CarnegieStage09.

Embryonic age 8.5 dpc (day post coitum). Refers to human CarnegieStage10.

Embryonic age 9 dpc (day post coitum). Refers to human CarnegieStage11.

Embryonic age 9.5 dpc (day post coitum). Refers to human CarnegieStage12.

Embryonic age 10 dpc (day post coitum). Refers to human CarnegieStages 13 to 15.

Embryonic age 10.5 dpc (day post coitum). Refers to human CarnegieStages 13 to 15.

Embryonic age 11 dpc (day post coitum). Refers to human CarnegieStages 13 to 15.

Embryonic age 11.5 dpc (day post coitum). Refers to human CarnegieStage16.

Embryonic age 12 dpc (day post coitum). Refers to human CarnegieStage17.

Embryonic age 13 dpc (day post coitum). Refers to human CarnegieStages 18 and 19.

Embryonic age 14 dpc (day post coitum). Refers to human CarnegieStages 20 to 23.

This term was obsoleted to follow human developmental ontology structure.

This stage describes the four Theiler stages that are commonly reported as equivalent to the human fetal period in the literature. They are anyway defined by embryonic days.

Embryonic age 15 dpc (day post coitum). Refers to the human fetal period.

Embryonic age 16 dpc (day post coitum). Refers to the human fetal period.

Embryonic age 17 dpc (day post coitum). Refers to the human fetal period.

TS26 is used for the period from embryonic day 18 up to birth itself. [https://github.com/tfhayamizu]

TS27 is used for postnatal days 0 through 3 (P0 to P3). This is a somewhat arbitrary cut-off but seems to best fit the data we have encountered. TS28 is then used from postnatal day 4 onward. [https://github.com/tfhayamizu]

This term was made obsolete due to discussion at https://github.com/obophenotype/developmental-stage-ontologies/issues/23. [ANiknejad]

This term was obsoleted as it is not fully accepted as a defined developmental stage in the literature. This stage describes the age at which mice are usually used as adolescent mouse models in the literature.

This term was obsoleted to include the mature stage into the ontology. Both terms have the same children, but contains of children (children of children) differ. The organisation of the postnatal development time in mouse is debatable, literature usually refers to mature or immature mice, with milestone around 6-8 weeks post-natal.

This term was made obsolete and replaced by premature stage, starting at P4 instead of birth, due to TS28 definition. [ANiknejad]

This term was made obsolete due to discussion at https://github.com/obophenotype/developmental-stage-ontologies/issues/23. [ANiknejad]

This stage is usually the stage during which the sexual maturity occurs.

This stage is commonly considered in the literature as the milestone that distinguishes between sexually immmature and mature stages (see http://www.ahc.umn.edu/rar/breeding.html).

Mice under 7 months of age are commonly considered as young adult in the literature, without loss of functional capability like hearing (see http://www.ncbi.nlm.nih.gov/pubmed/18259074).

This stage is commonly considered in the literature as the stage during which first evidence of loss of functional capability like hearing occurs in wild type mouse strain (see http://www.ncbi.nlm.nih.gov/pubmed/18259074).

This term was made obsolete due to discussion at https://github.com/obophenotype/developmental-stage-ontologies/issues/23. [ANiknejad]

Refers to MS (mid-streak) stage in Downs and Davies staging of gastrulating mouse embryos (PMID: 8269852, 1993).

Refers to MS-LS (mid-streak to late streak) stage in Downs and Davies staging of gastrulating mouse embryos, 1993 (see http://www.ncbi.nlm.nih.gov/pubmed/8269852).

Refers to MS-LS (mid-streak to late streak) stage in Downs and Davies staging of gastrulating mouse embryos, 1993 (see http://www.ncbi.nlm.nih.gov/pubmed/8269852).

Embryonic age 8 dpc (day post coitum). Refers to human CarnegieStage09.

Embryonic age 8 dpc (day post coitum). Refers to human CarnegieStage09.

It is commonly accepted that mouse reaches sexual maturity by six weeks of age (see http://www.ahc.umn.edu/rar/breeding.html). We start this stage at P4 because TS27 'newborn' stage is not defined as a postnatal stage.

This stage starts at P4.