It is a bit too early to tell definitively from this photo alone.
When plants first start showing pre-flowers at the nodes, the structures can look very similar before they fully develop and open. Here is what you'll want to look for over the next few days to confirm sex:
* Female (Pistils): Look closely at the node for small green teardrop-shaped calyxes. Shortly after, a pair of fine, white, hair-like pistils will emerge from the top.
* Male (Pollen Sacs): Male pre-flowers typically look like smooth, rounded, spherical balls or tiny "spades" sitting snugly right in the node, often attached to a tiny stalk without any white hairs.
Wait about 3 to 5 more days. At this stage, they are likely just starting to form, and clearer distinguishing features (pistils vs. pollen sacks) will become visible very soon. Keep a close eye on the upper nodes where pre-flowers typically show first!