Bingo !!! These are all Phasmid (walking stick insect) eggs.
There are about 4000 spec. of Phasmid all over the world with a lot of different shape of eggs.
Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot www.ngvm.nl