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See also 'Smallest organisms
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In a population of ''Microcebus berthae'', males significantly outnumber females. Despite there being no [[sexual dimorphism]] in skull length, canine height, or tail length, the average female is larger than the average male in head-body length and head width. Average body mass, while relatively equal during mating season, becomes smaller for males in the duration of time excluding [[mating season]]. Males have a home range of about {{convert|4.92|ha}}, while females have a home range of about {{convert|2.50|ha}}. Females tend to remain in a home range that is close to, or includes their place of birth. This is the opposite of males, who tend to disperse from their place of birth. The home ranges of individual lemurs tend to overlap with each other, with female home ranges overlapping with that of one or two other females, and male home ranges overlapping with that of up to nine other males.<ref name="Dammhahn, Melanie 2005"/>
Social systems of ''M. berthae'' are more similar to the [[gray mouse lemur]] (''Microcebus murinus'') than the [[fat-tailed dwarf lemur]] (''Cheirogaleus medius''), i.e. Madame Berthe's mouse lemur is sexually promiscuous rather than [[Monogamy in animals|monogamous]]. The range in distance of males is larger than that of the females in both Microcebus species, both before and after mating seasons. Research has also been conducted on the distribution of sleeping sites, as well as on testes size and the presence of vaginal plugs. Study of capture rates and physiological proof reveals no evidence that ''M. berthae'' has a hibernation season, which increases the chances of sexual activity within the species.<ref name="Schwab, Dorothea 2004">{{Cite journal|last1=Schwab|first1=D.|last2=Ganzhorn|first2=J. R. U.|year=2004|title=Distribution, Population Structure and Habitat Use of ''Microcebus berthae'' Compared to Those of Other Sympatric Cheirogalids|url=https://www.researchgate.net/publication/227244336|journal=International Journal of Primatology|volume=25|issue=2|pages=307|doi=10.1023/B:IJOP.0000019154.17401.90|s2cid=41872248}}</ref>
== Ecology ==
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