UNSW Embryology

Foundations - Lab 15 - Intro to Human Development

© Dr Mark Hill (2007)

Acknowledgements

Week 1 and 2 - Fertilization and Blastocyst Development

The menstrual cycle dictates timing of fertilization and implantation and therefore when life can begin.

Introduction

Development starts before fertilization with the release of the egg from the ovary (ovulation). This process along with preparation of the uterus for implantation is an endocrine controlled cycle, the menstrual cycle.

Comments

Dr Mark Hill

This first page will give a brief overview of: menstrual cycle, fertilization, blastocyst and implantation. You are not expected to know everything about these processes, just keep track of the relative "timings" as to when specific processes occur.

If you would like to know more, you can always click the linked "images", the "More?" or "Notes" links.

When will I have a baby?

These notes and linked materials have been prepared for Educational purposes only. Please email Dr Mark Hill if you wish to make a comment about this current project.

Menstrual Facts

The average menstrual cycle is 28 days with ovulation (egg release) occuring approximately the middle of the cycle.
The last menstrual period is used clinically in determining developmental ages. (More? Birth Date)
Menstruation phase (period) is the loss of the uterus epithelial functional layer and occurs if fertilization and implantation has not occurred before the end of the current cycle.