THere is not way someone can tell you based on a picture where a female stands breeding wise unless you post a picture of an ovulation.

To know it's about physical examination and changed as well as behaviour changes.

As breeding season progresses female gain weight but depending on when you do your weigh in your reading may not reflect the situation accurately.

So did you see an ovulation?

Where does the female spend most of her time when at rest?

Did you notice any changes (behaviour or physical)?