No information is available on the mating system of meadow jumping mice.
The breeding season of meadow jumping mice occurs shortly after hibernation in late April or May. Males emerge from hibernation slightly prior to females and are reproductively active when the females emerge. Within two weeks after emergence, the majority of females are pregnant and gestation begins. Gestation is usually about 18 days, but may be longer for lactating females. A female may have 2 to 3 litters in a year. The average litter size is 5.3, though the number of young varies between 2 and 9. In the north, most young are born and weaned between June and August. Small and weighing about 0.8 g, the neonates are naked, pink, blind, clawless and deaf, but squeak audibly at birth. In the first week, their ear pinnae unfold, fur begins to cover their backs, and their claws appear. They begin crawling between the first and second weeks, and by the third week they can hop, creep, and hear. Their incisors have erupted, and they have tawny coats. By the end of the fourth week, the young have adult pelage, and open eyes. Weaned, they are independent between the 28th and 33rd day. Those young females born during the spring may reproduce after two months.
Key Reproductive Features: Iteroparous; Seasonal breeding; Gonochoric/gonochoristic/dioecious (sexes separate); Sexual; Fertilization; Viviparous
Females may have 2 to 3 litters during the warm part of the year.
The breeding season of meadow jumping mice occurs shortly after hibernation in late April or May.
Female meadow jumping mice provide all the care for their young, until they are weaned and independent.
Parental Investment: Pre-fertilization; Pre-fertilization :: Provisioning; Pre-fertilization :: Protecting; Pre-fertilization :: Protecting :: Female; Pre-hatching/birth; Pre-hatching/birth :: Provisioning; Pre-hatching/birth :: Provisioning :: Female; Pre-hatching/birth :: Protecting; Pre-hatching/birth :: Protecting :: Female; Pre-weaning/fledging; Pre-weaning/fledging :: Provisioning; Pre-weaning/fledging :: Provisioning :: Female; Pre-weaning/fledging :: Protecting; Pre-weaning/fledging :: Protecting :: Female; Pre-independence; Pre-independence :: Provisioning; Pre-independence :: Provisioning :: Female; Pre-independence :: Protecting; Pre-independence :: Protecting :: Female