Unique in Utero Identification of Fetuses in Multi-Fetal Mouse Pregnancies by Placental Bi-Directional Arterial Spin Labeling (BD-ASL) MRI

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ability able addition additional adjacent administration affect alterations analyzed another arterial attention background backgrounds bearing bidirectional biological biomedical blood body carried cervix communication create days dead death deaths decreased defects destructive determine determining developed developing dies directional disordered display embryos ends environments examines example exist experiment female fetal fetus fetuses flow fluorescence fluorescent focus function genetic gestation growth hormonal hormones horn horns hydrodynamic identification in vivo influence influences inside institute interestingly intrauterine invasive known labeling laboratory larger last late litter litters local located location longitudinal mammals manipulation maternal measured mechanisms mediator mice microscopy middle modalities molecular mortality mother mouse must natural naturally near neighbor neighboring neighbors null occurring opens ovary pass perfusion phenomenon placental placentas position positioned possibilities pregnancies pregnancy previous primarily pups pursuing radiology recently reciprocal regulation removed respectively scanner share sharing sibling significantly slightly source space spin steroidal steroids studies suggest systemic systems trend unique uterine uterus versus vital volume whether