From Embryology

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Lab Attendance

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Lab Assessments

Lab Assessment 1

Article 1


This article was written in aims to evaluate a prospectively implemented clinical algorithm which served in the early identifications of Ectopic pregnancy (EP) and Heterotopic pregnancy (HP) after use of assisted reproductive technologies (In-vitro fertilization). The data used in this research were patients who all received in-vitro fertilization or other methods of Assisted reproductive technology from between January 1995 to June 2013.

The early pregnancy stage was monitored using clinical algorithms where all pregnancies were screened using Human chorionic gonadotropin (hCG) levels and any reported symptoms during pregnancy as well as use of ultrasound evaluations where hCG levels were abnormal or patient reported any pains.

The research found that within the 3904 pregnancies included in the data, the incidence of Ectopic and Heterotopic pregnancies were 0.77% and 0.46% respectively. The clinical algorithm managed to detect and select 96.7% of the 0.77% diagnosed with EP as well as 83.3% of the 0.46% diagnosed with HP leading to earlier treatment and resolution of the problem. These results showed the effectiveness of the developed clinical algorithm in the early identification and prompt intervention of EP and HP bypassing the catastrophic morbidity associated with delayed diagnosis

Article 2


The article researched the effects of different levels of progesterone on the day of human gonadotropin administration in the live birth delivery rates during in-vitro fertilization. Previous researches have shown that the presence of late follicular phase progesterone is essential for follicular development, ovulation and endometrial receptivity. Studies were carried out on 2723 cycles performed in patients aged between 19 ~35 years of age and undergoing controlled ovarian stimulation.

The patients underwent ovarian stimulation using a gonadotropin releasing hormone antagonist for pituitary down-regulation and then final oocyte maturation was triggered using hCG 36h before oocyte retrieval. On the day of hCG administration, progesterone evaluation was performed and live birth delivery rates were compared at regular progesterone intervals.

The study found that live birth rates were significantly lower in patients with bow low (<0.5 ng/ml) and high (>1.5 ng/ml) late follicular progesterone levels.

Lab Assessment 2

Biopsy of Morula Stage Embryo.png

Biopsy of a Morula Stage Embryo[1]

Lab Assessment 3




Lab Assessment 4

<quiz display=simple>

{Cells which migrate from somites form: |type="()"} - Respiratory System - Smooth Muscles - Digestive System + Skeletal Muscles - Reproductive System || Somites arise from the Paraxial Mesoderm and give rise to skeletal muscles as well as other musculoskeletal structures

{Which of the following statements are INCORRECT regarding Implantation? |type="()"} - Implantation commences at day 6 ~ 7 + The blastocyst rolls along the uterine wall to align the inner cell mass furthest from the uterine epithelium - Implantation is the process in which a blastocyst enters the uterine wall - A coagulation plug forms where the blastocyst has entered the uterine wall || The blastocyst initially rolls down the uterine walls aligning the inner cell mass to be closest to the uterine epithelium before implantation occurs. After the blastocyst has entered the Uterine wall, a coagulation plug forms at the site of implantation


<pubmed>26244658</pubmed> Look at this aye [2]

  1. <pubmed>25191937</pubmed>|[1]
  2. <pubmed>26244657</pubmed>

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