Ectopic pregnancy happens when the fertilized egg cannot make its way down the fallopian tube to the uterus. This could be a result of scar tissue on the fallopian tube from a past surgery, which blocks the egg’s path to the uterus. Other potential factors that may play a role include a...
The egg is fertilized by sperm, produced by male testes. This produces a blastocyst that must attach to the uterine wall. These reproductive changes occur when individuals enter puberty in adolescence. There are sexual and asexual forms of reproduction in human and animal life.Answer...
Another myth is that usingemergency contraception(such asPlan B One-Step) while pregnant may cause the spontaneous termination of your pregnancy. This is again not true. These pills have no effect once a fertilized egg has been implanted. Medication Abortion There are specific medications that can...
Implantation bleeding is a normal part of early pregnancy and often occurs as slight bleeding after conception. This light spotting happens when a fertilized egg attaches to the wall of the uterus, where it can begin growing. The lining of the uterus contains a rich network of blood vessels, ...
What will a fertilized egg develop into in seedless plants? Can seed plants reproduce asexually? What are the steps in angiosperm reproduction? What are the three types of genotypes? What is plant developmental biology? What did Mendel's cross-pollination of pea plants prove?
During the first 13 weeks, your baby changes from a fertilized egg into a fully-formedfetus. All the major organs and systems are taking shape. That means your baby could be harmed if you use street drugs, have an illness, or get exposed to radiation. Here’s what’s happening: ...
The first stage of embryonic development isthe fusion of egg and sperm to form a zygote. This step is known as fertilization. What blastula means? Blastula,hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg. The cells...
point where they felt a “sincere” threat to their religious liberties rested on the concept of who controls the implantation of a fertilized egg, the subsequent hospitality of the host’s uterus, and the hopeful birth of a human (not to be confused with a corporation) that should only ...
The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual. Embryo The collection of cells that has developed from the fertilized egg of a vertebrate animal, before all the major organs have developed. Zygote...
A fertilized egg cell. Zygote The cell resulting from the union of an ovum and a spermatozoon (including the organism that develops from that cell) Common Curiosities What is a foetus? A developmental stage in mammals from about 8 weeks post-fertilization until birth. 15 How long does the zy...