Ingredients for life
Definitions of reproduction: 1. The action or process of making a copy of something; 2. The production of offspring by a sexual or asexual process.
Further, to produce anything requires the assembly of basic materials into a product.
To make a chicken requires only to incubate the hen's egg for three weeks. A simpler example is to make pancakes, we assemble all the ingredients and apply the prescribed time and temperature, then finally we have beautiful pancakes.
To imagine that a new person exists at the time of conception is only a fantasy.