egg and sperm necklace | silver meta-catalog By day 3 the embryo

By day 3 the embryo has typically reached the 8-cell stage

Often bought as a gift after fellowship completion in spine or orthopaedic surgery

Graphite is in the catalog and shows the layered bonding of the same carbon

all in a structure that fits inside a glove

more often a milestone gift after a chromatin-focused PhD or a fellowship in epigenetics

egg and sperm necklace | silver meta-catalog By day 3 the embryoEgg and sperm necklace sterling silver The human egg is the largest cell in the body at roughly 120 micrometres. The sperm is roughly 60 micrometres, streamlined for transport. They meet by chance in the fallopian tube. Fertilisation is the moment two nuclei fuse, the cortical reaction seals the zona pellucida against other sperm, and a new diploid genome begins its first divisions. The Science of Fertilisation Human gametes are profoundly different