The swelling looks to be back closer to the tale. Can't tell for sure but looks good! Only my observations with my snakes, but when they are building up to ov. or actual ov., when picking them up the swollen area it feels tight and bloated and stays put when holding a couple inches down from the neck area while streched out. Now my girls that are gravid when holding them like this the eggs and such will gravitate tward the tail and they will look real skinny from there up. Also when palpating them while still building the follicls (or eggs) are still easier to palpate. After ovulation the eggs start to get softer and harder to feel one from the next. Just my 2 cents.
Hope this helps and good luck,
Casey