'variation in onset' is correct and usable in written English.
You can use this phrase if you are referring to a variation in the start or beginning of something. For example, "The variation in onset of the experiment allowed the scientists to compare different results."
Additionally, limited data support a genetic basis for variation in onset and severity, but specific loci have not been identified.
Variation in onset of estrus was reduced (P < 0.05) in heifers given EDB compared with those not given EDB.
In conclusion, 0.5 mg EDB given 24 h after PRID removal to heifers decreased the interval to estrous onset at emergence or dominance, decreased variation in onset of estrus and decreased pregnancy rates when given at emergence of a follicle wave.
The DSC thermograms of the prepared solvates showed a single broad endothermic peak with slight variation in onset temperatures followed by not so sharp melting endotherms.
Other factors such as seasonal variation in onset and urban rural differences in disease frequency lend support to a role for environmental factors [ 1].
An interesting organisational feature in obstetrics is the inherent random variation in onset of spontaneous labour which makes it difficult to precisely plan the necessary number of staff at the obstetric clinics.
Migraine and cluster headache both show distinct attack patterns and while the underlying mechanisms of this circadian variation in attack onset remain to be fully explored, recent evidence points to clear physiological, anatomical and genetic points of convergence.
The atypical values we observed at 2 minutes after stimulation were presumably caused by variations in onset of responses in individual cells.
There was however considerable variation in the onset latencies between subjects, with multifidus onset occurring within 160 ms of stimulus onset in five subjects during the sled acceleration and six subjects (four of which were common) during the acoustic stimulus.
In this article, we document an exciting discovery that tripling the CYB-3 dosage resulted in significant variation in anaphase onset skewed toward the delay in anaphase onset.
Associated with a strong variation in the onset temperature for etching, we find a fundamental difference in the onset of etching for an impermeable layer and for graphene flakes.
