Thanks for the query.
I understand your concern.
Though minimal amount, as there was direct ejaculation, if your girlfriend was around her ovulatory period at the time of intercourse, there is some possibility of pregnancy.
Masturbation in the previous day can decrease the spermatozoa count but few spermatozoa are enough for conception.
So, if she misses her expected date of periods, better let her go for urine pregnancy test once.
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