As far as the LAMS is concerned, when assessing grip strength, what is the score for a pt who has normal grip on one side only?

Mom is having a post-partum hemorrhage CTAS 1-2 and there is a stable neonate, can we leave neonate on scene with Dad and call for 2nd unit for baby or can we leave? Do we have to wait until arrival of 2nd unit? No policy on this.